Securities (Reconciliation of fair value of available for sale securities) (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Reconciliation of fair value of securities
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	$ 264	$ 8,808
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax	(125,205)	(21,396)
Debt Securities, Available-for-sale, Allowance for Credit Loss	0	0
Debt Securities, Available-for-sale	1,501,949	1,571,148
Debt Securities, Available-for-sale, Amortized Cost	1,626,890	1,583,736
U.S. government agency securities
Reconciliation of fair value of securities
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax		990
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax	(21,849)	(2,901)
Debt Securities, Available-for-sale, Allowance for Credit Loss	0	0
Debt Securities, Available-for-sale	209,455	215,482
Debt Securities, Available-for-sale, Amortized Cost	231,304	217,393
U.S. treasury securities
Reconciliation of fair value of securities
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax		172
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax	(64,650)	(12,191)
Debt Securities, Available-for-sale, Allowance for Credit Loss	0	0
Debt Securities, Available-for-sale	809,098	861,448
Debt Securities, Available-for-sale, Amortized Cost	873,748	873,467
Agency mortgage-backed securities
Reconciliation of fair value of securities
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	246	4,512
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax	(32,151)	(5,534)
Debt Securities, Available-for-sale, Allowance for Credit Loss	0	0
Debt Securities, Available-for-sale	377,790	363,933
Debt Securities, Available-for-sale, Amortized Cost	409,695	364,955
Agency Collateralized Mortgage Obligations [Member]
Reconciliation of fair value of securities
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	13	1,282
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax	(1,550)	(571)
Debt Securities, Available-for-sale, Allowance for Credit Loss	0	0
Debt Securities, Available-for-sale	44,477	79,677
Debt Securities, Available-for-sale, Amortized Cost	46,014	78,966
US States and Political Subdivisions Debt Securities [Member]
Reconciliation of fair value of securities
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	5	11
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax	0	0
Debt Securities, Available-for-sale, Allowance for Credit Loss	0	0
Debt Securities, Available-for-sale	197	203
Debt Securities, Available-for-sale, Amortized Cost	192	192
Single Issuer Trust Preferred Securities Issued by Banks and Insurers [Member]
Reconciliation of fair value of securities
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	0	2
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax	(21)	0
Debt Securities, Available-for-sale, Allowance for Credit Loss	0	0
Debt Securities, Available-for-sale	468	491
Debt Securities, Available-for-sale, Amortized Cost	489	489
Pooled trust preferred securities issued by banks and insurers
Reconciliation of fair value of securities
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	0	0
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax	(201)	(199)
Debt Securities, Available-for-sale, Allowance for Credit Loss	0	0
Debt Securities, Available-for-sale	999	1,000
Debt Securities, Available-for-sale, Amortized Cost	1,200	1,199
Small Business Administration Pooled Securities [Member]
Reconciliation of fair value of securities
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	0	1,839
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax	(4,783)	0
Debt Securities, Available-for-sale, Allowance for Credit Loss	0	0
Debt Securities, Available-for-sale	59,465	48,914
Debt Securities, Available-for-sale, Amortized Cost	$ 64,248	$ 47,075

Amount, before tax, of unrealized gain in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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Amount, before tax, of unrealized loss in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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