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Goodwill and Intangible Assets (Tables)
12 Months Ended
Dec. 31, 2020
Goodwill and Intangible Assets Disclosure [Abstract]  
Schedule of Finite-Lived Intangible Assets [Table Text Block]
The following table presents the original cost and accumulated amortization of intangible assets (in thousands):
 Dec. 31,
 20202019
Core deposit premiums$103,200 $103,200 
Less accumulated amortization32,256 19,364 
Net core deposit premiums70,944 83,836 
Other identifiable intangible assets82,731 74,372 
Less accumulated amortization40,239 32,937 
Net other identifiable intangible assets42,492 41,435 
Total intangible assets, net$113,436 $125,271 
Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block]
Expected amortization expense for intangible assets that will continue to be amortized (in thousands):
Core
Deposit
Premiums
Other
Identifiable
Intangible Assets
Total
2021$11,893 $6,599 $18,492 
202210,981 5,232 16,213 
202310,145 4,191 14,336 
20249,379 3,178 12,557 
20258,675 2,767 11,442 
Thereafter19,871 20,525 40,396 
 $70,944 $42,492 $113,436 
Schedule of Goodwill [Table Text Block]
The changes in the carrying value of goodwill by operating segment are as follows (in thousands):
 Commercial BankingConsumer BankingWealth
Management
Funds Management and OtherTotal
Balance, December 31, 2018$313,270 $43,458 $90,702 $601,833 $1,049,263 
Adjustment1
600,661 — — (601,833)(1,172)
Balance, December 31, 2019913,931 43,458 90,702 — 1,048,091 
Balance, December 31, 2020$913,931 $43,458 $90,702 $ $1,048,091 
1    Goodwill related to the CoBiz acquisition was not yet allocated to the operating segments as of December 31, 2018 and was included in Funds Management and Other in 2018 then allocated during 2019.