Investment Securities - Amortized Cost, Gross Unrealized Gains and Losses and Fair Values (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Investment Holdings [Line Items]
Amortized cost	$ 1,267,715
Fair Value	1,187,588	$ 894,335
Investment securities held to maturity, at amortized cost, net (fair value of $559,312 and $376,331, respectively)	615,653	383,393
Total investment securities	559,312	376,331
Fair Value, Recurring [Member]
Investment Holdings [Line Items]
Fair Value	1,187,588	894,335
Level 2 \| Fair Value, Recurring [Member]
Investment Holdings [Line Items]
Amortized cost	1,267,715	883,832
Gross Unrealized Gains	1,519	15,341
Gross Unrealized Losses	(81,646)	(4,838)
Fair Value	1,167,649	894,335
Investment securities held to maturity, at amortized cost, net (fair value of $559,312 and $376,331, respectively)	615,653	383,393
Debt Securities, Held-to-maturity, Accumulated Unrecognized Gain	257	120
Debt Securities, Held-to-maturity, Accumulated Unrecognized Loss	(56,598)	(7,182)
Total investment securities	559,312	376,331
U.S. government and agency securities \| Fair Value, Recurring [Member]
Investment Holdings [Line Items]
Fair Value	65,668	21,373
U.S. government and agency securities \| Level 2 \| Fair Value, Recurring [Member]
Investment Holdings [Line Items]
Amortized cost	68,912	21,494
Gross Unrealized Gains	0	55
Gross Unrealized Losses	(3,244)	(176)
Fair Value	45,729	21,373
Investment securities held to maturity, at amortized cost, net (fair value of $559,312 and $376,331, respectively)	150,960	141,011
Debt Securities, Held-to-maturity, Accumulated Unrecognized Gain	0	120
Debt Securities, Held-to-maturity, Accumulated Unrecognized Loss	(23,416)	(1,768)
Total investment securities	127,544	139,363
Municipal securities \| Fair Value, Recurring [Member]
Investment Holdings [Line Items]
Fair Value	200,010	221,212
Municipal securities \| Level 2 \| Fair Value, Recurring [Member]
Investment Holdings [Line Items]
Amortized cost	213,402	213,158
Gross Unrealized Gains	977	8,908
Gross Unrealized Losses	(14,369)	(854)
Fair Value	200,010	221,212
Residential CMO and MBS \| Fair Value, Recurring [Member]
Investment Holdings [Line Items]
Fair Value	398,156	306,884
Residential CMO and MBS \| Level 2 \| Fair Value, Recurring [Member]
Investment Holdings [Line Items]
Amortized cost	433,903	307,366
Gross Unrealized Gains	70	2,111
Gross Unrealized Losses	(35,817)	(2,593)
Fair Value	398,156	306,884
Investment securities held to maturity, at amortized cost, net (fair value of $559,312 and $376,331, respectively)	159,007	24,529
Debt Securities, Held-to-maturity, Accumulated Unrecognized Gain	257	0
Debt Securities, Held-to-maturity, Accumulated Unrecognized Loss	(5,774)	(153)
Total investment securities	153,490	24,376
Commercial CMO and MBS \| Fair Value, Recurring [Member]
Investment Holdings [Line Items]
Fair Value	493,620	315,861
Commercial CMO and MBS \| Level 2 \| Fair Value, Recurring [Member]
Investment Holdings [Line Items]
Amortized cost	520,772	313,169
Gross Unrealized Gains	466	3,891
Gross Unrealized Losses	(27,618)	(1,199)
Fair Value	493,620	315,861
Investment securities held to maturity, at amortized cost, net (fair value of $559,312 and $376,331, respectively)	305,686	217,853
Debt Securities, Held-to-maturity, Accumulated Unrecognized Gain	0	0
Debt Securities, Held-to-maturity, Accumulated Unrecognized Loss	(27,408)	(5,261)
Total investment securities	278,278	212,592
Corporate obligations \| Fair Value, Recurring [Member]
Investment Holdings [Line Items]
Fair Value	5,978	2,014
Corporate obligations \| Level 2 \| Fair Value, Recurring [Member]
Investment Holdings [Line Items]
Amortized cost	6,003	2,007
Gross Unrealized Gains	0	7
Gross Unrealized Losses	(25)	0
Fair Value	5,978	2,014
Other asset-backed securities \| Fair Value, Recurring [Member]
Investment Holdings [Line Items]
Fair Value	24,156	26,991
Other asset-backed securities \| Level 2 \| Fair Value, Recurring [Member]
Investment Holdings [Line Items]
Amortized cost	24,723	26,638
Gross Unrealized Gains	6	369
Gross Unrealized Losses	(573)	(16)
Fair Value	$ 24,156	$ 26,991

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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Amount of accumulated unrecognized gain on investment in debt security measured at amortized cost (held-to-maturity).

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