Securities Securities (Reconciliation of amortized cost of held to maturity securities) (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Schedule of Held-to-maturity Securities [Line Items]
Debt Securities, Held-to-maturity	$ 1,408,189	$ 1,066,818
Debt Securities, Held-to-maturity, Accumulated Unrecognized Gain	355	12,474
Debt Securities, Held-to-maturity, Accumulated Unrecognized Loss	(111,379)	(15,159)
Debt Securities, Held-to-maturity, Allowance for Credit Loss	0	0
Debt Securities, Held-to-maturity, Fair Value	1,297,165	1,064,133
Small Business Administration Pooled Securities [Member]
Schedule of Held-to-maturity Securities [Line Items]
Debt Securities, Held-to-maturity	65,029	21,023
Debt Securities, Held-to-maturity, Accumulated Unrecognized Gain	251	733
Debt Securities, Held-to-maturity, Accumulated Unrecognized Loss	(978)	0
Debt Securities, Held-to-maturity, Allowance for Credit Loss	0	0
Debt Securities, Held-to-maturity, Fair Value	64,302	21,756
Trust Preferred Securities Subject to Mandatory Redemption [Member]
Schedule of Held-to-maturity Securities [Line Items]
Debt Securities, Held-to-maturity	1,500	1,500
Debt Securities, Held-to-maturity, Accumulated Unrecognized Gain	8	8
Debt Securities, Held-to-maturity, Accumulated Unrecognized Loss	0	0
Debt Securities, Held-to-maturity, Allowance for Credit Loss	0	0
Debt Securities, Held-to-maturity, Fair Value	1,508	1,508
Collateralized Debt Obligations [Member]
Schedule of Held-to-maturity Securities [Line Items]
Debt Securities, Held-to-maturity	577,183	415,736
Debt Securities, Held-to-maturity, Accumulated Unrecognized Gain	6	3,232
Debt Securities, Held-to-maturity, Accumulated Unrecognized Loss	(52,195)	(10,123)
Debt Securities, Held-to-maturity, Allowance for Credit Loss	0	0
Debt Securities, Held-to-maturity, Fair Value	524,994	408,845
Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member]
Schedule of Held-to-maturity Securities [Line Items]
Debt Securities, Held-to-maturity	631,754	493,012
Debt Securities, Held-to-maturity, Accumulated Unrecognized Gain	90	8,495
Debt Securities, Held-to-maturity, Accumulated Unrecognized Loss	(47,770)	(4,271)
Debt Securities, Held-to-maturity, Allowance for Credit Loss	0	0
Debt Securities, Held-to-maturity, Fair Value	584,074	497,236
US Treasury Securities [Member]
Schedule of Held-to-maturity Securities [Line Items]
Debt Securities, Held-to-maturity	100,595	102,560
Debt Securities, Held-to-maturity, Accumulated Unrecognized Gain	0	6
Debt Securities, Held-to-maturity, Accumulated Unrecognized Loss	(8,608)	(324)
Debt Securities, Held-to-maturity, Allowance for Credit Loss	0	0
Debt Securities, Held-to-maturity, Fair Value	91,987	102,242
U.S. government agency securities
Schedule of Held-to-maturity Securities [Line Items]
Debt Securities, Held-to-maturity	32,128	32,987
Debt Securities, Held-to-maturity, Accumulated Unrecognized Gain	0	0
Debt Securities, Held-to-maturity, Accumulated Unrecognized Loss	(1,828)	(441)
Debt Securities, Held-to-maturity, Allowance for Credit Loss	0	0
Debt Securities, Held-to-maturity, Fair Value	$ 30,300	$ 32,546