Income Taxes - Components of Deferred Tax Assets and Deferred Tax Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Deferred tax assets:
Allowance for loan losses	$ 30,335	$ 34,397
Leases	25,389	24,098
Charitable contribution limitation carryover	18,278	22,942
Employee benefits	13,996	0
Unrealized loss on available for sale securities	17,370	0
Investment losses	10,680	0
Accrued expenses	6,888	5,047
Fixed assets	3,799	4,183
Loan basis difference fair value adjustments	3,949	461
PPP loans fee income	2,967	5,969
Other	1,783	967
Total deferred tax assets before valuation allowance	135,434	98,064
Valuation allowance	(700)	(12,000)
Total deferred tax assets	134,734	86,064
Deferred tax liabilities:
Amortization of intangibles	17,339	13,585
Unrealized gain on available for sale securities	0	13,005
Partnerships	3,324	1,448
Cash flow hedges	2,878	11,658
Trading securities	6,482	5,110
Lease obligation	23,849	23,048
Employee benefits	0	1,613
Other	4,327	3,368
Total deferred tax liabilities	58,199	72,835
Net deferred income tax assets	$ 76,535	$ 13,229