Loans - Risk Category of Loans After Adoption of CECL (Details) - USD ($)	3 Months Ended		12 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Dec. 31, 2023
Accounts, Notes, Loans and Financing Receivable [Line Items]
2024/2023	$ 115,678,000		$ 984,591,000
2024/2023, Charge-offs	21,000		266,000
2023/2022	985,832,000		1,895,110,000
2023/2022, Charge-offs	21,000		191,000
2022/2021	1,907,563,000		1,211,746,000
2022/2021, Charge-offs	0		230,000
2021/2020	1,190,194,000		1,117,119,000
2021/2020, Charge-offs	0		7,000
2020/2019	1,078,841,000		529,014,000
2020/2019, Charge-offs	0		32,000
Pre-2020/2019	2,337,476,000		1,897,160,000
Pre-2020/2019, Charge-offs	575,000		43,000
Revolving Loans	703,782,000		702,555,000
Revolving Loans, Charge-offs	0		0
Revolving to Term	1,058,000		6,566,000
Revolving to Term, Charge-offs	0		0
Loans	8,320,424,000		8,343,861,000
Charge-offs	617,000	$ 139,000	769,000
Non-owner occupied commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
2024/2023	21,283,000		317,959,000
2023/2022	318,461,000		615,028,000
2022/2021	625,243,000		371,828,000
2021/2020	366,130,000		501,856,000
2020/2019	496,659,000		269,149,000
Pre-2020/2019	1,127,117,000		895,346,000
Revolving Loans	18,456,000		16,793,000
Revolving to Term	303,000		0
Loans	2,973,652,000		2,987,959,000
Charge-offs	0	0
Non-owner occupied commercial | Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
2024/2023	21,283,000		315,447,000
2023/2022	314,967,000		611,051,000
2022/2021	621,297,000		371,828,000
2021/2020	366,130,000		489,642,000
2020/2019	484,530,000		266,172,000
Pre-2020/2019	1,019,546,000		793,791,000
Revolving Loans	18,135,000		16,498,000
Revolving to Term	303,000		0
Loans	2,846,191,000		2,864,429,000
Non-owner occupied commercial | Watch
Accounts, Notes, Loans and Financing Receivable [Line Items]
2024/2023	0		2,512,000
2023/2022	0		3,237,000
2022/2021	3,946,000		0
2021/2020	0		7,328,000
2020/2019	12,129,000		0
Pre-2020/2019	50,573,000		49,126,000
Revolving Loans	0		0
Revolving to Term	0		0
Loans	66,648,000		62,203,000
Non-owner occupied commercial | Special mention
Accounts, Notes, Loans and Financing Receivable [Line Items]
2024/2023	0		0
2023/2022	3,494,000		740,000
2022/2021	0		0
2021/2020	0		4,886,000
2020/2019	0		2,977,000
Pre-2020/2019	27,084,000		25,104,000
Revolving Loans	0		0
Revolving to Term	0		0
Loans	30,578,000		33,707,000
Non-owner occupied commercial | Substandard
Accounts, Notes, Loans and Financing Receivable [Line Items]
2024/2023	0		0
2023/2022	0		0
2022/2021	0		0
2021/2020	0		0
2020/2019	0		0
Pre-2020/2019	29,914,000		27,325,000
Revolving Loans	321,000		295,000
Revolving to Term	0		0
Loans	30,235,000		27,620,000
Owner occupied commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
2024/2023	15,707,000		58,328,000
2023/2022	58,590,000		343,225,000
2022/2021	337,357,000		222,798,000
2021/2020	212,586,000		173,133,000
2020/2019	171,786,000		95,748,000
Pre-2020/2019	459,159,000		379,070,000
Revolving Loans	8,876,000		9,959,000
Revolving to Term	0		960,000
Loans	1,264,061,000		1,283,221,000
Charge-offs	0	0
Owner occupied commercial | Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
2024/2023	15,707,000		58,328,000
2023/2022	58,590,000		342,669,000
2022/2021	335,849,000		187,089,000
2021/2020	162,969,000		150,210,000
2020/2019	148,880,000		68,978,000
Pre-2020/2019	391,368,000		334,536,000
Revolving Loans	8,535,000		9,315,000
Revolving to Term	0		0
Loans	1,121,898,000		1,151,125,000
Owner occupied commercial | Watch
Accounts, Notes, Loans and Financing Receivable [Line Items]
2024/2023	0		0
2023/2022	0		0
2022/2021	0		23,554,000
2021/2020	3,769,000		1,673,000
2020/2019	3,052,000		23,288,000
Pre-2020/2019	52,826,000		33,480,000
Revolving Loans	41,000		644,000
Revolving to Term	0		0
Loans	59,688,000		82,639,000
Owner occupied commercial | Special mention
Accounts, Notes, Loans and Financing Receivable [Line Items]
2024/2023	0		0
2023/2022	0		556,000
2022/2021	548,000		3,512,000
2021/2020	2,507,000		1,403,000
2020/2019	0		1,646,000
Pre-2020/2019	6,605,000		5,262,000
Revolving Loans	300,000		0
Revolving to Term	0		960,000
Loans	9,960,000		13,339,000
Owner occupied commercial | Substandard
Accounts, Notes, Loans and Financing Receivable [Line Items]
2024/2023	0		0
2023/2022	0		0
2022/2021	960,000		8,643,000
2021/2020	43,341,000		19,847,000
2020/2019	19,854,000		1,836,000
Pre-2020/2019	8,360,000		5,792,000
Revolving Loans	0		0
Revolving to Term	0		0
Loans	72,515,000		36,118,000
Multifamily
Accounts, Notes, Loans and Financing Receivable [Line Items]
2024/2023	18,453,000		143,030,000
2023/2022	142,805,000		301,511,000
2022/2021	304,073,000		264,257,000
2021/2020	263,375,000		279,627,000
2020/2019	257,884,000		67,196,000
Pre-2020/2019	414,873,000		347,788,000
Revolving Loans	3,936,000		5,496,000
Revolving to Term	0		0
Loans	1,405,399,000		1,408,905,000
Charge-offs	0	0
Multifamily | Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
2024/2023	18,453,000		143,030,000
2023/2022	142,805,000		300,128,000
2022/2021	297,810,000		263,154,000
2021/2020	259,825,000		250,089,000
2020/2019	243,041,000		63,413,000
Pre-2020/2019	392,509,000		328,095,000
Revolving Loans	3,936,000		5,496,000
Revolving to Term	0		0
Loans	1,358,379,000		1,353,405,000
Multifamily | Watch
Accounts, Notes, Loans and Financing Receivable [Line Items]
2024/2023	0		0
2023/2022	0		1,383,000
2022/2021	6,263,000		8,000
2021/2020	2,477,000		29,538,000
2020/2019	14,288,000		3,783,000
Pre-2020/2019	10,255,000		6,509,000
Revolving Loans	0		0
Revolving to Term	0		0
Loans	33,283,000		41,221,000
Multifamily | Special mention
Accounts, Notes, Loans and Financing Receivable [Line Items]
2024/2023	0		0
2023/2022	0		0
2022/2021	0		0
2021/2020	0		0
2020/2019	555,000		0
Pre-2020/2019	11,611,000		11,682,000
Revolving Loans	0		0
Revolving to Term	0		0
Loans	12,166,000		11,682,000
Multifamily | Substandard
Accounts, Notes, Loans and Financing Receivable [Line Items]
2024/2023	0		0
2023/2022	0		0
2022/2021	0		1,095,000
2021/2020	1,073,000		0
2020/2019	0		0
Pre-2020/2019	498,000		1,502,000
Revolving Loans	0		0
Revolving to Term	0		0
Loans	1,571,000		2,597,000
Non-owner occupied residential
Accounts, Notes, Loans and Financing Receivable [Line Items]
2024/2023	3,810,000		14,720,000
2023/2022	12,717,000		38,713,000
2022/2021	38,059,000		27,974,000
2021/2020	27,107,000		19,708,000
2020/2019	19,217,000		24,585,000
Pre-2020/2019	95,454,000		81,950,000
Revolving Loans	5,627,000		6,336,000
Revolving to Term	23,000		0
Loans	202,014,000		213,986,000
Charge-offs	0	0
Non-owner occupied residential | Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
2024/2023	3,810,000		14,720,000
2023/2022	12,717,000		36,596,000
2022/2021	35,957,000		27,974,000
2021/2020	27,107,000		19,708,000
2020/2019	19,217,000		23,560,000
Pre-2020/2019	90,081,000		75,250,000
Revolving Loans	5,552,000		6,261,000
Revolving to Term	23,000		0
Loans	194,464,000		204,069,000
Non-owner occupied residential | Watch
Accounts, Notes, Loans and Financing Receivable [Line Items]
2024/2023	0		0
2023/2022	0		2,117,000
2022/2021	0		0
2021/2020	0		0
2020/2019	0		0
Pre-2020/2019	2,443,000		3,499,000
Revolving Loans	75,000		75,000
Revolving to Term	0		0
Loans	2,518,000		5,691,000
Non-owner occupied residential | Special mention
Accounts, Notes, Loans and Financing Receivable [Line Items]
2024/2023	0		0
2023/2022	0		0
2022/2021	2,102,000		0
2021/2020	0		0
2020/2019	0		494,000
Pre-2020/2019	1,161,000		1,683,000
Revolving Loans	0		0
Revolving to Term	0		0
Loans	3,263,000		2,177,000
Non-owner occupied residential | Substandard
Accounts, Notes, Loans and Financing Receivable [Line Items]
2024/2023	0		0
2023/2022	0		0
2022/2021	0		0
2021/2020	0		0
2020/2019	0		531,000
Pre-2020/2019	1,769,000		1,518,000
Revolving Loans	0		0
Revolving to Term	0		0
Loans	1,769,000		2,049,000
Commercial, industrial and other
Accounts, Notes, Loans and Financing Receivable [Line Items]
2024/2023	5,192,000		23,855,000
2024/2023, Charge-offs			0
2023/2022	23,920,000		40,716,000
2023/2022, Charge-offs			0
2022/2021	39,056,000		42,850,000
2022/2021, Charge-offs			13,000
2021/2020	40,961,000		20,717,000
2021/2020, Charge-offs			0
2020/2019	15,710,000		24,696,000
2020/2019, Charge-offs			0
Pre-2020/2019	68,438,000		46,428,000
Pre-2020/2019, Charge-offs			14,000
Revolving Loans	448,488,000		437,200,000
Revolving Loans, Charge-offs			0
Revolving to Term	386,000		2,432,000
Revolving to Term, Charge-offs			0
Loans	642,151,000		638,894,000
Charge-offs	0	0	27,000
Commercial, industrial and other | Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
2024/2023	4,913,000		19,628,000
2023/2022	20,668,000		38,783,000
2022/2021	37,220,000		41,152,000
2021/2020	33,002,000		20,639,000
2020/2019	14,374,000		24,297,000
Pre-2020/2019	66,749,000		43,755,000
Revolving Loans	422,265,000		415,925,000
Revolving to Term	386,000		557,000
Loans	599,577,000		604,736,000
Commercial, industrial and other | Watch
Accounts, Notes, Loans and Financing Receivable [Line Items]
2024/2023	279,000		4,137,000
2023/2022	2,848,000		1,558,000
2022/2021	179,000		878,000
2021/2020	6,695,000		49,000
2020/2019	1,275,000		272,000
Pre-2020/2019	1,094,000		1,129,000
Revolving Loans	22,581,000		16,771,000
Revolving to Term	0		1,875,000
Loans	34,951,000		26,669,000
Commercial, industrial and other | Special mention
Accounts, Notes, Loans and Financing Receivable [Line Items]
2024/2023	0		90,000
2023/2022	404,000		0
2022/2021	1,657,000		0
2021/2020	722,000		0
2020/2019	38,000		1,000
Pre-2020/2019	246,000		1,219,000
Revolving Loans	3,527,000		625,000
Revolving to Term	0		0
Loans	6,594,000		1,935,000
Commercial, industrial and other | Substandard
Accounts, Notes, Loans and Financing Receivable [Line Items]
2024/2023	0		0
2023/2022	0		375,000
2022/2021	0		820,000
2021/2020	542,000		29,000
2020/2019	23,000		126,000
Pre-2020/2019	349,000		325,000
Revolving Loans	115,000		3,879,000
Revolving to Term	0		0
Loans	1,029,000		5,554,000
Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
2024/2023	7,704,000		49,307,000
2024/2023, Charge-offs	0		0
2023/2022	59,757,000		146,173,000
2023/2022, Charge-offs	0		13,000
2022/2021	160,788,000		71,193,000
2022/2021, Charge-offs	0		0
2021/2020	74,672,000		2,688,000
2021/2020, Charge-offs	0		0
2020/2019	2,706,000		4,912,000
2020/2019, Charge-offs	0		0
Pre-2020/2019	8,809,000		16,697,000
Pre-2020/2019, Charge-offs	564,000		0
Revolving Loans	2,817,000		8,736,000
Revolving Loans, Charge-offs	0		0
Revolving to Term	0		3,039,000
Revolving to Term, Charge-offs	0		0
Loans	317,253,000		302,745,000
Charge-offs	564,000	0	13,000
Construction | Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
2024/2023	7,704,000		46,970,000
2023/2022	57,258,000		145,072,000
2022/2021	159,684,000		60,681,000
2021/2020	62,976,000		2,688,000
2020/2019	2,706,000		4,912,000
Pre-2020/2019	8,809,000		3,999,000
Revolving Loans	2,817,000		8,079,000
Revolving to Term	0		3,039,000
Loans	301,954,000		275,440,000
Construction | Watch
Accounts, Notes, Loans and Financing Receivable [Line Items]
2024/2023	0		2,337,000
2023/2022	2,499,000		1,101,000
2022/2021	1,104,000		10,512,000
2021/2020	0		0
2020/2019	0		0
Pre-2020/2019	0		0
Revolving Loans	0		657,000
Revolving to Term	0		0
Loans	3,603,000		14,607,000
Construction | Special mention
Accounts, Notes, Loans and Financing Receivable [Line Items]
2024/2023	0
2023/2022	0
2022/2021	0
2021/2020	11,696,000
2020/2019	0
Pre-2020/2019	0
Revolving Loans	0
Revolving to Term	0
Loans	11,696,000
Construction | Substandard
Accounts, Notes, Loans and Financing Receivable [Line Items]
2024/2023	0		0
2023/2022	0		0
2022/2021	0		0
2021/2020	0		0
2020/2019	0		0
Pre-2020/2019	0		12,698,000
Revolving Loans	0		0
Revolving to Term	0		0
Loans	0		12,698,000
Equipment finance
Accounts, Notes, Loans and Financing Receivable [Line Items]
2024/2023	14,817,000		80,907,000
2024/2023, Charge-offs			29,000
2023/2022	76,156,000		56,938,000
2023/2022, Charge-offs			44,000
2022/2021	53,036,000		23,965,000
2022/2021, Charge-offs			194,000
2021/2020	20,929,000		10,949,000
2021/2020, Charge-offs			0
2020/2019	9,005,000		5,807,000
2020/2019, Charge-offs			31,000
Pre-2020/2019	4,214,000		605,000
Pre-2020/2019, Charge-offs			9,000
Revolving Loans	0		0
Revolving Loans, Charge-offs			0
Revolving to Term	0		0
Revolving to Term, Charge-offs			0
Loans	178,157,000		179,171,000
Charge-offs	0	61,000	307,000
Equipment finance | Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
2024/2023	14,817,000		80,831,000
2023/2022	76,086,000		56,719,000
2022/2021	52,159,000		23,839,000
2021/2020	20,549,000		10,917,000
2020/2019	8,955,000		5,742,000
Pre-2020/2019	4,123,000		605,000
Revolving Loans	0		0
Revolving to Term	0		0
Loans	176,689,000		178,653,000
Equipment finance | Substandard
Accounts, Notes, Loans and Financing Receivable [Line Items]
2024/2023	0		76,000
2023/2022	70,000		219,000
2022/2021	877,000		126,000
2021/2020	380,000		32,000
2020/2019	50,000		65,000
Pre-2020/2019	91,000		0
Revolving Loans	0		0
Revolving to Term	0		0
Loans	1,468,000		518,000
Residential mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
2024/2023	25,164,000		270,695,000
2024/2023, Charge-offs			0
2023/2022	268,808,000		312,166,000
2023/2022, Charge-offs			128,000
2022/2021	310,079,000		158,892,000
2022/2021, Charge-offs			0
2021/2020	157,142,000		101,324,000
2021/2020, Charge-offs			0
2020/2019	99,042,000		33,476,000
2020/2019, Charge-offs			0
Pre-2020/2019	137,334,000		109,215,000
Pre-2020/2019, Charge-offs			0
Revolving Loans	0		0
Revolving Loans, Charge-offs			0
Revolving to Term	0		0
Revolving to Term, Charge-offs			0
Loans	997,569,000		985,768,000
Charge-offs	0	0	128,000
Residential mortgage | Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
2024/2023	25,164,000		270,695,000
2023/2022	268,808,000		312,166,000
2022/2021	310,079,000		157,716,000
2021/2020	155,979,000		100,900,000
2020/2019	98,625,000		33,022,000
Pre-2020/2019	136,182,000		108,868,000
Revolving Loans	0		0
Revolving to Term	0		0
Loans	994,837,000		983,367,000
Residential mortgage | Watch
Accounts, Notes, Loans and Financing Receivable [Line Items]
2024/2023			0
2023/2022			0
2022/2021			0
2021/2020			0
2020/2019			0
Pre-2020/2019			0
Revolving Loans			0
Revolving to Term			0
Loans			0
Residential mortgage | Special mention
Accounts, Notes, Loans and Financing Receivable [Line Items]
2024/2023			0
2023/2022			0
2022/2021			0
2021/2020			0
2020/2019			0
Pre-2020/2019			0
Revolving Loans			0
Revolving to Term			0
Loans			0
Residential mortgage | Substandard
Accounts, Notes, Loans and Financing Receivable [Line Items]
2024/2023	0		0
2023/2022	0		0
2022/2021	0		1,176,000
2021/2020	1,163,000		424,000
2020/2019	417,000		454,000
Pre-2020/2019	1,152,000		347,000
Revolving Loans	0		0
Revolving to Term	0		0
Loans	2,732,000		2,401,000
Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
2024/2023	3,548,000		25,790,000
2024/2023, Charge-offs	21,000		237,000
2023/2022	24,618,000		40,640,000
2023/2022, Charge-offs	21,000		6,000
2022/2021	39,872,000		27,989,000
2022/2021, Charge-offs	0		23,000
2021/2020	27,292,000		7,117,000
2021/2020, Charge-offs	0		7,000
2020/2019	6,832,000		3,445,000
2020/2019, Charge-offs	0		1,000
Pre-2020/2019	22,078,000		20,061,000
Pre-2020/2019, Charge-offs	11,000		20,000
Revolving Loans	215,582,000		218,035,000
Revolving Loans, Charge-offs	0		0
Revolving to Term	346,000		135,000
Revolving to Term, Charge-offs	0		0
Loans	340,168,000		343,212,000
Charge-offs	53,000	$ 78,000	294,000
Consumer | Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
2024/2023	3,548,000		25,790,000
2023/2022	24,618,000		40,640,000
2022/2021	39,872,000		27,989,000
2021/2020	27,283,000		7,117,000
2020/2019	6,832,000		3,445,000
Pre-2020/2019	20,921,000		18,865,000
Revolving Loans	215,543,000		218,035,000
Revolving to Term	346,000		99,000
Loans	338,963,000		341,980,000
Consumer | Substandard
Accounts, Notes, Loans and Financing Receivable [Line Items]
2024/2023	0		0
2023/2022	0		0
2022/2021	0		0
2021/2020	9,000		0
2020/2019	0		0
Pre-2020/2019	1,157,000		1,196,000
Revolving Loans	39,000		0
Revolving to Term	0		36,000
Loans	$ 1,205,000		$ 1,232,000