Nature of Operations and Summary of Significant Accounting Policies - Allowance for Credit Losses and Loans Held for Sale (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Jan. 01, 2021	Dec. 31, 2020
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Allowance for Credit Losses	$ 245		$ 0
Loans	9,241,861		9,243,174
PPP, CARES Act
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Loans	106,600		667,100
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]
Loans		$ 4,776
Impact of adopting ASC 326 | State and municipal
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Allowance for Credit Losses		$ 245	$ 245