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Parent Company Financial Information - Statements of Cash Flows (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Cash flows from operating activities    
Net income $ 39,978 $ 25,823
Adjustments to reconcile net income to net cash provided by operating activities:    
Provision for loan losses 3,359 11,242
Stock-based compensation expense 1,347 983
Deferred income tax benefit (1,927) (3,170)
Amortization of debt issuance cost 0 139
Changes in assets and liabilities:    
Accrued interest receivable 233 (3,364)
Other assets (1,222) (412)
Accrued interest payable (661) (667)
Other liabilities (3,210) 7,462
Net cash provided by operating activities 132,076 5,457
Cash flows from investing activities    
Net cash used in investing activities (238,231) (385,512)
Cash flows from financing activities    
Dividends paid (1,382) 0
Repurchase of common stock 0 (3,720)
Proceeds from exercise of stock options 967 922
Net cash provided by financing activities 142,640 412,141
Net increase (decrease) in cash and cash equivalents 36,485 32,086
Cash and cash equivalents, beginning of year 146,910 114,824
Cash and cash equivalents, end of year 183,395 146,910
Parent Company    
Cash flows from operating activities    
Net income 39,978 25,823
Adjustments to reconcile net income to net cash provided by operating activities:    
Provision for loan losses 70 0
Undistributed net income of subsidiaries (32,956) (20,137)
Decrease in receivable from Bank 0 16
Stock-based compensation expense 1,347 983
Director and employee compensation paid in Company stock 519 268
Deferred income tax benefit (14) (21)
Amortization of debt issuance cost 0 139
Changes in assets and liabilities:    
Accrued interest receivable 83 (202)
Prepaid income taxes and taxes payable 0 9
Other assets (14) 0
Accrued interest payable 1 (39)
Other liabilities (130) (17)
Net cash provided by operating activities 8,884 6,822
Cash flows from investing activities    
Net increase in loans receivable (9,269) 1,045
Capital contributions to subsidiaries (1,347) (1,183)
Net cash used in investing activities (10,616) (138)
Cash flows from financing activities    
Repayment of debt 0 (3,500)
Dividends paid (1,382) 0
Repurchase of common stock 0 (3,720)
Proceeds from exercise of stock options 967 922
Net cash provided by financing activities (415) (6,298)
Net increase (decrease) in cash and cash equivalents (2,147) 386
Cash and cash equivalents, beginning of year 2,777 2,391
Cash and cash equivalents, end of year $ 630 $ 2,777