Securities Securities (Available for sale securities in continuous unrealized loss position) (Details) $ in Thousands	Sep. 30, 2025 USD ($) holding	Dec. 31, 2024 USD ($) holding
Debt Securities, Available-for-sale, Unrealized Loss Position [Line Items]
Debt Securities, Available-for-sale, Unrealized Loss Position, Number of Positions \| holding	214	160
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	$ 293,114	$ 128,499
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	(3,664)	(2,874)
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	1,033,817	1,119,582
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	(60,940)	(100,172)
Debt Securities, Available-for-sale, Unrealized Loss Position	1,326,931	1,248,081
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	$ 64,604	$ 103,046
Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member]
Debt Securities, Available-for-sale, Unrealized Loss Position [Line Items]
Debt Securities, Available-for-sale, Unrealized Loss Position, Number of Positions \| holding	111	117
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	$ 96,770	$ 127,152
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	(481)	(2,867)
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	292,217	249,098
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	(24,222)	(34,915)
Debt Securities, Available-for-sale, Unrealized Loss Position	388,987	376,250
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	$ 24,703	$ 37,782
Collateralized Debt Obligations [Member]
Debt Securities, Available-for-sale, Unrealized Loss Position [Line Items]
Debt Securities, Available-for-sale, Unrealized Loss Position, Number of Positions \| holding	57	11
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	$ 180,392	$ 1,153
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	(3,116)	(4)
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	24,341	26,890
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	(1,514)	(2,170)
Debt Securities, Available-for-sale, Unrealized Loss Position	204,733	28,043
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	$ 4,630	$ 2,174
US States and Political Subdivisions Debt Securities [Member]
Debt Securities, Available-for-sale, Unrealized Loss Position [Line Items]
Debt Securities, Available-for-sale, Unrealized Loss Position, Number of Positions \| holding		1
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months		$ 194
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss		(3)
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer		0
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss		0
Debt Securities, Available-for-sale, Unrealized Loss Position		194
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss		$ 3
Pooled trust preferred securities issued by banks and insurers
Debt Securities, Available-for-sale, Unrealized Loss Position [Line Items]
Debt Securities, Available-for-sale, Unrealized Loss Position, Number of Positions \| holding	1	1
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	$ 0	$ 0
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	0	0
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	1,040	1,095
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	(80)	(85)
Debt Securities, Available-for-sale, Unrealized Loss Position	1,040	1,095
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	$ 80	$ 85
Small Business Administration Pooled Securities [Member]
Debt Securities, Available-for-sale, Unrealized Loss Position [Line Items]
Debt Securities, Available-for-sale, Unrealized Loss Position, Number of Positions \| holding	8	8
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	$ 0	$ 0
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	0	0
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	38,577	40,838
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	(5,179)	(7,194)
Debt Securities, Available-for-sale, Unrealized Loss Position	38,577	40,838
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	$ 5,179	$ 7,194
U.S. government agency securities
Debt Securities, Available-for-sale, Unrealized Loss Position [Line Items]
Debt Securities, Available-for-sale, Unrealized Loss Position, Number of Positions \| holding	9	9
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	$ 0	$ 0
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	0	0
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	217,175	209,660
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	(11,714)	(19,792)
Debt Securities, Available-for-sale, Unrealized Loss Position	217,175	209,660
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	$ 11,714	$ 19,792
US Treasury Securities [Member]
Debt Securities, Available-for-sale, Unrealized Loss Position [Line Items]
Debt Securities, Available-for-sale, Unrealized Loss Position, Number of Positions \| holding	10	13
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	$ 0	$ 0
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	0	0
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	460,467	592,001
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	(18,231)	(36,016)
Debt Securities, Available-for-sale, Unrealized Loss Position	460,467	592,001
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	$ 18,231	$ 36,016
Taxable Municipal Bonds
Debt Securities, Available-for-sale, Unrealized Loss Position [Line Items]
Debt Securities, Available-for-sale, Unrealized Loss Position, Number of Positions \| holding	18
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	$ 15,952
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	(67)
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	0
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	0
Debt Securities, Available-for-sale, Unrealized Loss Position	15,952
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	$ 67

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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