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| <context id="i14355d1ad0df42b8aef5b31e436fe1ef_D20210228-20210228"> |
| | <entity> |
| | | <identifier scheme="http://www.sec.gov/CIK"> 0001212545 </identifier> |
| | | </entity> |
| | <period> |
| | | <startDate> 2021-02-28 </startDate> |
| | | <endDate> 2021-02-28 </endDate> |
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| | <entity> |
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| | <period> |
| | | <startDate> 2021-02-28 </startDate> |
| | | <endDate> 2021-02-28 </endDate> |
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| | <entity> |
| | | <identifier scheme="http://www.sec.gov/CIK"> 0001212545 </identifier> |
| | | <segment> |
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| | <period> |
| | | <startDate> 2021-02-28 </startDate> |
| | | <endDate> 2021-02-28 </endDate> |
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| <dei:EntityRegistrantName contextRef="i14355d1ad0df42b8aef5b31e436fe1ef_D20210228-20210228" id="id3VybDovL2RvY3MudjEvZG9jOjAzYWQxNjI4NWI2NTRjODhhMWU2NTY5ZTU5NmJlY2YyL3NlYzowM2FkMTYyODViNjU0Yzg4YTFlNjU2OWU1OTZiZWNmMl8xL2ZyYWc6OGZlNTI4NTRmZTYyNGQwOThjZGFhYTlmZDUzMDA2YWIvdGV4dHJlZ2lvbjo4ZmU1Mjg1NGZlNjI0ZDA5OGNkYWFhOWZkNTMwMDZhYl82OTMz_01234686-3836-43a8-a7ab-4a977145589e"> WESTERN ALLIANCE BANCORPORATION </dei:EntityRegistrantName> |
| <dei:EntityIncorporationStateCountryCode contextRef="i14355d1ad0df42b8aef5b31e436fe1ef_D20210228-20210228" id="id3VybDovL2RvY3MudjEvZG9jOjAzYWQxNjI4NWI2NTRjODhhMWU2NTY5ZTU5NmJlY2YyL3NlYzowM2FkMTYyODViNjU0Yzg4YTFlNjU2OWU1OTZiZWNmMl8xL2ZyYWc6OGZlNTI4NTRmZTYyNGQwOThjZGFhYTlmZDUzMDA2YWIvdGFibGU6ODY5MTBlODFmNjMwNGVmOWJhZDM3ZGMzODYxNWVkM2IvdGFibGVyYW5nZTo4NjkxMGU4MWY2MzA0ZWY5YmFkMzdkYzM4NjE1ZWQzYl8wLTAtMS0xLTA_319b454d-99a2-449f-ad86-7d0ddfaf0dc5"> DE </dei:EntityIncorporationStateCountryCode> |
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| <dei:EntityTaxIdentificationNumber contextRef="i14355d1ad0df42b8aef5b31e436fe1ef_D20210228-20210228" id="id3VybDovL2RvY3MudjEvZG9jOjAzYWQxNjI4NWI2NTRjODhhMWU2NTY5ZTU5NmJlY2YyL3NlYzowM2FkMTYyODViNjU0Yzg4YTFlNjU2OWU1OTZiZWNmMl8xL2ZyYWc6OGZlNTI4NTRmZTYyNGQwOThjZGFhYTlmZDUzMDA2YWIvdGFibGU6ODY5MTBlODFmNjMwNGVmOWJhZDM3ZGMzODYxNWVkM2IvdGFibGVyYW5nZTo4NjkxMGU4MWY2MzA0ZWY5YmFkMzdkYzM4NjE1ZWQzYl8wLTQtMS0xLTA_d0790bf7-1081-46b0-a5cd-2f5907e6e528"> 88-0365922 </dei:EntityTaxIdentificationNumber> |
| <dei:EntityAddressAddressLine1 contextRef="i14355d1ad0df42b8aef5b31e436fe1ef_D20210228-20210228" id="id3VybDovL2RvY3MudjEvZG9jOjAzYWQxNjI4NWI2NTRjODhhMWU2NTY5ZTU5NmJlY2YyL3NlYzowM2FkMTYyODViNjU0Yzg4YTFlNjU2OWU1OTZiZWNmMl8xL2ZyYWc6OGZlNTI4NTRmZTYyNGQwOThjZGFhYTlmZDUzMDA2YWIvdGV4dHJlZ2lvbjo4ZmU1Mjg1NGZlNjI0ZDA5OGNkYWFhOWZkNTMwMDZhYl82OTM0_42981e0f-d406-48b9-ab47-4e194c04702f"> One E. Washington Street </dei:EntityAddressAddressLine1> |
| <dei:EntityAddressCityOrTown contextRef="i14355d1ad0df42b8aef5b31e436fe1ef_D20210228-20210228" id="id3VybDovL2RvY3MudjEvZG9jOjAzYWQxNjI4NWI2NTRjODhhMWU2NTY5ZTU5NmJlY2YyL3NlYzowM2FkMTYyODViNjU0Yzg4YTFlNjU2OWU1OTZiZWNmMl8xL2ZyYWc6OGZlNTI4NTRmZTYyNGQwOThjZGFhYTlmZDUzMDA2YWIvdGV4dHJlZ2lvbjo4ZmU1Mjg1NGZlNjI0ZDA5OGNkYWFhOWZkNTMwMDZhYl82OTM5_28d67bc8-9353-45ae-abb2-13b6b406204e"> Phoenix </dei:EntityAddressCityOrTown> |
| <dei:EntityAddressStateOrProvince contextRef="i14355d1ad0df42b8aef5b31e436fe1ef_D20210228-20210228" id="id3VybDovL2RvY3MudjEvZG9jOjAzYWQxNjI4NWI2NTRjODhhMWU2NTY5ZTU5NmJlY2YyL3NlYzowM2FkMTYyODViNjU0Yzg4YTFlNjU2OWU1OTZiZWNmMl8xL2ZyYWc6OGZlNTI4NTRmZTYyNGQwOThjZGFhYTlmZDUzMDA2YWIvdGV4dHJlZ2lvbjo4ZmU1Mjg1NGZlNjI0ZDA5OGNkYWFhOWZkNTMwMDZhYl82OTQw_cd92aa61-4dc8-4512-aa80-c6fde3f776ad"> AZ </dei:EntityAddressStateOrProvince> |
| <dei:EntityAddressPostalZipCode contextRef="i14355d1ad0df42b8aef5b31e436fe1ef_D20210228-20210228" id="id3VybDovL2RvY3MudjEvZG9jOjAzYWQxNjI4NWI2NTRjODhhMWU2NTY5ZTU5NmJlY2YyL3NlYzowM2FkMTYyODViNjU0Yzg4YTFlNjU2OWU1OTZiZWNmMl8xL2ZyYWc6OGZlNTI4NTRmZTYyNGQwOThjZGFhYTlmZDUzMDA2YWIvdGV4dHJlZ2lvbjo4ZmU1Mjg1NGZlNjI0ZDA5OGNkYWFhOWZkNTMwMDZhYl82OTQx_f6a76756-e9b7-4f2f-9e77-2ed0122b89d9"> 85004 </dei:EntityAddressPostalZipCode> |
| <dei:CityAreaCode contextRef="i14355d1ad0df42b8aef5b31e436fe1ef_D20210228-20210228" id="id3VybDovL2RvY3MudjEvZG9jOjAzYWQxNjI4NWI2NTRjODhhMWU2NTY5ZTU5NmJlY2YyL3NlYzowM2FkMTYyODViNjU0Yzg4YTFlNjU2OWU1OTZiZWNmMl8xL2ZyYWc6OGZlNTI4NTRmZTYyNGQwOThjZGFhYTlmZDUzMDA2YWIvdGV4dHJlZ2lvbjo4ZmU1Mjg1NGZlNjI0ZDA5OGNkYWFhOWZkNTMwMDZhYl82OTQy_6c2d5a45-e97c-48c7-8594-65069e451394"> 602 </dei:CityAreaCode> |
| <dei:LocalPhoneNumber contextRef="i14355d1ad0df42b8aef5b31e436fe1ef_D20210228-20210228" id="id3VybDovL2RvY3MudjEvZG9jOjAzYWQxNjI4NWI2NTRjODhhMWU2NTY5ZTU5NmJlY2YyL3NlYzowM2FkMTYyODViNjU0Yzg4YTFlNjU2OWU1OTZiZWNmMl8xL2ZyYWc6OGZlNTI4NTRmZTYyNGQwOThjZGFhYTlmZDUzMDA2YWIvdGV4dHJlZ2lvbjo4ZmU1Mjg1NGZlNjI0ZDA5OGNkYWFhOWZkNTMwMDZhYl82OTQz_b9608422-c4f6-4252-a857-a397c03722f2"> 389-3500 </dei:LocalPhoneNumber> |
| <dei:WrittenCommunications contextRef="i14355d1ad0df42b8aef5b31e436fe1ef_D20210228-20210228" id="id3VybDovL2RvY3MudjEvZG9jOjAzYWQxNjI4NWI2NTRjODhhMWU2NTY5ZTU5NmJlY2YyL3NlYzowM2FkMTYyODViNjU0Yzg4YTFlNjU2OWU1OTZiZWNmMl8xL2ZyYWc6OGZlNTI4NTRmZTYyNGQwOThjZGFhYTlmZDUzMDA2YWIvdGV4dHJlZ2lvbjo4ZmU1Mjg1NGZlNjI0ZDA5OGNkYWFhOWZkNTMwMDZhYl82OTM1_66a78d03-f68b-4a2e-994f-7a87075543d8"> false </dei:WrittenCommunications> |
| <dei:SolicitingMaterial contextRef="i14355d1ad0df42b8aef5b31e436fe1ef_D20210228-20210228" id="id3VybDovL2RvY3MudjEvZG9jOjAzYWQxNjI4NWI2NTRjODhhMWU2NTY5ZTU5NmJlY2YyL3NlYzowM2FkMTYyODViNjU0Yzg4YTFlNjU2OWU1OTZiZWNmMl8xL2ZyYWc6OGZlNTI4NTRmZTYyNGQwOThjZGFhYTlmZDUzMDA2YWIvdGV4dHJlZ2lvbjo4ZmU1Mjg1NGZlNjI0ZDA5OGNkYWFhOWZkNTMwMDZhYl82OTM2_30b693a1-2aea-42b7-9600-ec77cecb32c1"> false </dei:SolicitingMaterial> |
| <dei:PreCommencementTenderOffer contextRef="i14355d1ad0df42b8aef5b31e436fe1ef_D20210228-20210228" id="id3VybDovL2RvY3MudjEvZG9jOjAzYWQxNjI4NWI2NTRjODhhMWU2NTY5ZTU5NmJlY2YyL3NlYzowM2FkMTYyODViNjU0Yzg4YTFlNjU2OWU1OTZiZWNmMl8xL2ZyYWc6OGZlNTI4NTRmZTYyNGQwOThjZGFhYTlmZDUzMDA2YWIvdGV4dHJlZ2lvbjo4ZmU1Mjg1NGZlNjI0ZDA5OGNkYWFhOWZkNTMwMDZhYl82OTM3_0069701c-5d08-4234-bb71-3d74e84c3be4"> false </dei:PreCommencementTenderOffer> |
| <dei:PreCommencementIssuerTenderOffer contextRef="i14355d1ad0df42b8aef5b31e436fe1ef_D20210228-20210228" id="id3VybDovL2RvY3MudjEvZG9jOjAzYWQxNjI4NWI2NTRjODhhMWU2NTY5ZTU5NmJlY2YyL3NlYzowM2FkMTYyODViNjU0Yzg4YTFlNjU2OWU1OTZiZWNmMl8xL2ZyYWc6OGZlNTI4NTRmZTYyNGQwOThjZGFhYTlmZDUzMDA2YWIvdGV4dHJlZ2lvbjo4ZmU1Mjg1NGZlNjI0ZDA5OGNkYWFhOWZkNTMwMDZhYl82OTM4_7f16912c-5544-4d12-b66e-04d1cde0f33a"> false </dei:PreCommencementIssuerTenderOffer> |
| <dei:Security12bTitle contextRef="i12e6f8806203438f80ee9ce4dafae15d_D20210228-20210228" id="id3VybDovL2RvY3MudjEvZG9jOjAzYWQxNjI4NWI2NTRjODhhMWU2NTY5ZTU5NmJlY2YyL3NlYzowM2FkMTYyODViNjU0Yzg4YTFlNjU2OWU1OTZiZWNmMl8xL2ZyYWc6OGZlNTI4NTRmZTYyNGQwOThjZGFhYTlmZDUzMDA2YWIvdGFibGU6ZjBiYWNhYTA0Zjc5NDFjNGFmOTk4YTZjNjdkYzIxOGYvdGFibGVyYW5nZTpmMGJhY2FhMDRmNzk0MWM0YWY5OThhNmM2N2RjMjE4Zl8xLTAtMS0xLTA_d1fb0d7e-12ad-435c-aa13-7a2874107b57"> Common Stock, $0.0001 Par Value </dei:Security12bTitle> |
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