Loans Receivable - Past Due Loans (Details) - USD ($)	3 Months Ended
	Mar. 31, 2026	Mar. 31, 2025	Dec. 31, 2025
Loans Receivable, Past Due [Line Items]
Loans receivable	$ 5,722,238,000		$ 4,783,266,000
Loans 90 days or more past due, still accruing interest	67,000		194,000
Interest Income Recognized	894,000	$ 13,000
Nonaccrual
Loans Receivable, Past Due [Line Items]
Interest Income Recognized	0	0
30-89 Days
Loans Receivable, Past Due [Line Items]
Loans receivable	22,387,000		10,735,000
90 Days or Greater
Loans Receivable, Past Due [Line Items]
Loans receivable	8,494,000		20,063,000
Total Past  Due
Loans Receivable, Past Due [Line Items]
Loans receivable	30,881,000		30,798,000
Current
Loans Receivable, Past Due [Line Items]
Loans receivable	5,691,357,000		4,752,468,000
Commercial Business
Loans Receivable, Past Due [Line Items]
Loans receivable	4,739,459,000		3,910,673,000
Interest Income Recognized	482,000	13,000
Commercial Business | 30-89 Days
Loans Receivable, Past Due [Line Items]
Loans receivable	14,398,000		9,805,000
Commercial Business | 90 Days or Greater
Loans Receivable, Past Due [Line Items]
Loans receivable	6,765,000		5,920,000
Commercial Business | Total Past  Due
Loans Receivable, Past Due [Line Items]
Loans receivable	21,163,000		15,725,000
Commercial Business | Current
Loans Receivable, Past Due [Line Items]
Loans receivable	4,718,296,000		3,894,948,000
Commercial Business | Commercial and industrial
Loans Receivable, Past Due [Line Items]
Loans receivable	1,059,457,000		818,000,000
Interest Income Recognized	1,000	13,000
Commercial Business | Commercial and industrial | 30-89 Days
Loans Receivable, Past Due [Line Items]
Loans receivable	8,432,000		7,115,000
Commercial Business | Commercial and industrial | 90 Days or Greater
Loans Receivable, Past Due [Line Items]
Loans receivable	4,406,000		1,973,000
Commercial Business | Commercial and industrial | Total Past  Due
Loans Receivable, Past Due [Line Items]
Loans receivable	12,838,000		9,088,000
Commercial Business | Commercial and industrial | Current
Loans Receivable, Past Due [Line Items]
Loans receivable	1,046,619,000		808,912,000
Commercial Business | Owner Occupied Commercial Real Estate [Member]
Loans Receivable, Past Due [Line Items]
Loans receivable	1,213,585,000		1,034,829,000
Interest Income Recognized	10,000	0
Commercial Business | Owner Occupied Commercial Real Estate [Member] | 30-89 Days
Loans Receivable, Past Due [Line Items]
Loans receivable	4,832,000		735,000
Commercial Business | Owner Occupied Commercial Real Estate [Member] | 90 Days or Greater
Loans Receivable, Past Due [Line Items]
Loans receivable	0		0
Commercial Business | Owner Occupied Commercial Real Estate [Member] | Total Past  Due
Loans Receivable, Past Due [Line Items]
Loans receivable	4,832,000		735,000
Commercial Business | Owner Occupied Commercial Real Estate [Member] | Current
Loans Receivable, Past Due [Line Items]
Loans receivable	1,208,753,000		1,034,094,000
Commercial Business | Non-owner-occupied CRE
Loans Receivable, Past Due [Line Items]
Loans receivable	2,466,417,000		2,057,844,000
Interest Income Recognized	471,000	0
Commercial Business | Non-owner-occupied CRE | 30-89 Days
Loans Receivable, Past Due [Line Items]
Loans receivable	1,134,000		1,955,000
Commercial Business | Non-owner-occupied CRE | 90 Days or Greater
Loans Receivable, Past Due [Line Items]
Loans receivable	2,359,000		3,947,000
Commercial Business | Non-owner-occupied CRE | Total Past  Due
Loans Receivable, Past Due [Line Items]
Loans receivable	3,493,000		5,902,000
Commercial Business | Non-owner-occupied CRE | Current
Loans Receivable, Past Due [Line Items]
Loans receivable	2,462,924,000		2,051,942,000
Residential Portfolio Segment [Member]
Loans Receivable, Past Due [Line Items]
Loans receivable	361,384,000		358,834,000
Interest Income Recognized	0	0
Residential Portfolio Segment [Member] | 30-89 Days
Loans Receivable, Past Due [Line Items]
Loans receivable	2,353,000		425,000
Residential Portfolio Segment [Member] | 90 Days or Greater
Loans Receivable, Past Due [Line Items]
Loans receivable	583,000		1,389,000
Residential Portfolio Segment [Member] | Total Past  Due
Loans Receivable, Past Due [Line Items]
Loans receivable	2,936,000		1,814,000
Residential Portfolio Segment [Member] | Current
Loans Receivable, Past Due [Line Items]
Loans receivable	358,448,000		357,020,000
Real estate construction and land development:
Loans Receivable, Past Due [Line Items]
Loans receivable	411,902,000		343,325,000
Loans 90 days or more past due, still accruing interest	0		194,000
Real estate construction and land development: | 30-89 Days
Loans Receivable, Past Due [Line Items]
Loans receivable	5,565,000		0
Real estate construction and land development: | 90 Days or Greater
Loans Receivable, Past Due [Line Items]
Loans receivable	949,000		12,409,000
Real estate construction and land development: | Total Past  Due
Loans Receivable, Past Due [Line Items]
Loans receivable	6,514,000		12,409,000
Real estate construction and land development: | Current
Loans Receivable, Past Due [Line Items]
Loans receivable	405,388,000		330,916,000
Real estate construction and land development: | Real estate construction and land development:
Loans Receivable, Past Due [Line Items]
Loans receivable	123,409,000		95,350,000
Loans 90 days or more past due, still accruing interest	0		194,000
Interest Income Recognized	412,000	0
Real estate construction and land development: | Real estate construction and land development: | 30-89 Days
Loans Receivable, Past Due [Line Items]
Loans receivable	0		0
Real estate construction and land development: | Real estate construction and land development: | 90 Days or Greater
Loans Receivable, Past Due [Line Items]
Loans receivable	949,000		6,714,000
Real estate construction and land development: | Real estate construction and land development: | Total Past  Due
Loans Receivable, Past Due [Line Items]
Loans receivable	949,000		6,714,000
Real estate construction and land development: | Real estate construction and land development: | Current
Loans Receivable, Past Due [Line Items]
Loans receivable	122,460,000		88,636,000
Real estate construction and land development: | Commercial and multifamily
Loans Receivable, Past Due [Line Items]
Loans receivable	288,493,000		247,975,000
Real estate construction and land development: | Commercial and multifamily | 30-89 Days
Loans Receivable, Past Due [Line Items]
Loans receivable	5,565,000		0
Real estate construction and land development: | Commercial and multifamily | 90 Days or Greater
Loans Receivable, Past Due [Line Items]
Loans receivable	0		5,695,000
Real estate construction and land development: | Commercial and multifamily | Total Past  Due
Loans Receivable, Past Due [Line Items]
Loans receivable	5,565,000		5,695,000
Real estate construction and land development: | Commercial and multifamily | Current
Loans Receivable, Past Due [Line Items]
Loans receivable	282,928,000		242,280,000
Consumer
Loans Receivable, Past Due [Line Items]
Loans receivable	209,493,000		170,434,000
Loans 90 days or more past due, still accruing interest	67,000		0
Interest Income Recognized		$ 0
Consumer | 30-89 Days
Loans Receivable, Past Due [Line Items]
Loans receivable	71,000		505,000
Consumer | 90 Days or Greater
Loans Receivable, Past Due [Line Items]
Loans receivable	197,000		345,000
Consumer | Total Past  Due
Loans Receivable, Past Due [Line Items]
Loans receivable	268,000		850,000
Consumer | Current
Loans Receivable, Past Due [Line Items]
Loans receivable	$ 209,225,000		$ 169,584,000