Nature of Operations and Summary of Significant Accounting Policies - Recent Accounting Changes (Details) - USD ($) $ in Thousands		Dec. 31, 2021	Jan. 01, 2021	Dec. 31, 2020
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Retained earnings		$ (864,839)		$ (788,578)
Allowance for credit losses - loans	[1]	195,397		130,648
Allowance for credit losses on unfunded loan commitments		20,500	$ 20,500	0
Allowance for credit losses		245		0
State and municipal
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Allowance for credit losses		245		0
Impact of adopting ASC 326
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Retained earnings			$ 68,040
Percent of increase in allowance			57.00%
Allowance for credit losses - loans			$ 74,055	74,055
Allowance for credit losses on unfunded loan commitments		$ 20,500	20,500
Impact of adopting ASC 326 | State and municipal
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Allowance for credit losses			$ 245	$ 245

[1] Beginning January 1, 2021, the amount is based on the current expected credit loss methodology. Prior to January 1, 2021, the amount is based on the incurred loss methodology. See additional details in NOTE 1. NATURE OF OPERATIONS AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES of these Notes to Consolidated Financial Statements.