Investment Securities - Unrealized losses (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Schedule of Available-for-sale Securities
Debt securities, amortized cost	$ 1,098,373	$ 689,001
Less than 12 Months, Fair Value	496,816	105,252
12 Months or More, Fair Value	75,609	81,237
Total Fair Value	572,425	186,489
Less than 12 Months, Unrealized Losses	(7,842)	(1,085)
12 Months or More, Unrealized Losses	(1,696)	(1,195)
Total Unrealized Losses	(9,538)	(2,280)
U.S. Government agencies
Schedule of Available-for-sale Securities
Debt securities, amortized cost	373	651
Obligations of states and political subdivisions
Schedule of Available-for-sale Securities
Debt securities, amortized cost	512,952	361,734
Less than 12 Months, Fair Value	143,336	36,209
12 Months or More, Fair Value	6,336	0
Total Fair Value	149,672	36,209
Less than 12 Months, Unrealized Losses	(2,896)	(339)
12 Months or More, Unrealized Losses	(292)	0
Total Unrealized Losses	(3,188)	(339)
U.S. Government sponsored entities and agencies collateralized by residential mortgage obligations
Schedule of Available-for-sale Securities
Debt securities, amortized cost	213,471	214,203
Less than 12 Months, Fair Value	91,385	30,755
12 Months or More, Fair Value	40,365	77,337
Total Fair Value	131,750	108,092
Less than 12 Months, Unrealized Losses	(905)	(385)
12 Months or More, Unrealized Losses	(372)	(1,095)
Total Unrealized Losses	(1,277)	(1,480)
Private label residential mortgage and asset backed securities
Schedule of Available-for-sale Securities
Debt securities, amortized cost	317,089	82,413
Less than 12 Months, Fair Value	230,987	25,407
12 Months or More, Fair Value	28,908	0
Total Fair Value	259,895	25,407
Less than 12 Months, Unrealized Losses	(3,661)	(242)
12 Months or More, Unrealized Losses	(1,032)	0
Total Unrealized Losses	(4,693)	(242)
Corporate Debt Securities
Schedule of Available-for-sale Securities
Debt securities, amortized cost	44,500	30,000
Less than 12 Months, Fair Value	21,183	12,881
12 Months or More, Fair Value	0	3,900
Total Fair Value	21,183	16,781
Less than 12 Months, Unrealized Losses	(317)	(119)
12 Months or More, Unrealized Losses	0	(100)
Total Unrealized Losses	(317)	$ (219)
US Treasury Securities
Schedule of Available-for-sale Securities
Debt securities, amortized cost	9,988
Less than 12 Months, Fair Value	9,925
12 Months or More, Fair Value	0
Total Fair Value	9,925
Less than 12 Months, Unrealized Losses	(63)
12 Months or More, Unrealized Losses	0
Total Unrealized Losses	$ (63)