Consolidated Statements of Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Interest income:
Loans receivable	$ 228,841	$ 255,236	$ 217,774
Debt securities available for sale and equity securities	30,211	28,376	30,938
Debt securities held to maturity	8,632	8,025	8,180
Federal funds and interest-earning deposits	430	413	594
Federal Home Loan Bank stock dividends	2,036	3,661	3,597
Total interest income	270,150	295,711	261,083
Interest expense:
Deposits	29,109	55,246	61,551
Borrowings	7,907	18,892	27,161
Total interest expense	37,016	74,138	88,712
Net interest income	233,134	221,573	172,371
(Reversal of) provision for loan losses	(9,953)	18,447	4,224
Net interest income after (reversal of) provision for loan losses	243,087	203,126	168,147
Non-interest income:
Bank-owned life insurance	5,994	6,620	5,846
Gain on securities transactions	2,025	370	2,612
Change in fair value of equity securities	(1,792)	767	305
Gain on sale of loans	10,790	5,444	785
Other non-interest income	8,940	6,983	5,922
Total non-interest income (loss)	38,831	31,270	31,636
Non-interest expense:
Compensation and employee benefits	99,534	100,687	84,256
Occupancy	20,071	19,170	16,180
Federal deposit insurance premiums	2,374	1,901	895
Advertising	2,358	2,641	3,932
Professional fees	7,363	5,810	5,913
Data processing and software expenses	11,497	10,285	8,670
Merger-related expenses	822	1,931	2,755
Loss on extinguishment of debt	2,851	1,158	0
Other non-interest expense	8,867	14,556	6,100
Total non-interest expense	155,737	158,139	128,701
Income before income tax expense	126,181	76,257	71,082
Income tax expense	34,132	18,654	16,365
Net income	$ 92,049	$ 57,603	$ 54,717
Earnings per share - basic (in dollars per share)	$ 0.88	$ 0.52	$ 0.49
Earnings per share - diluted (in dollars per share)	$ 0.88	$ 0.52	$ 0.49
Weighted average shares outstanding - basic (in shares)	104,156,112	109,755,924	111,101,246
Weighted average shares outstanding - diluted (in shares)	104,156,112	109,755,924	111,101,246
Demand deposit account fees
Non-interest income:
Revenue	$ 3,803	$ 3,633	$ 4,478
Title insurance fees
Non-interest income:
Revenue	6,088	5,034	4,981
Loan fees and service charges
Non-interest income:
Revenue	$ 2,983	$ 2,419	$ 6,707