Fair Value of Financial Instruments - Hierarchy Table on Recurring Basis (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Financial assets
Investment securities available-for-sale, at fair value	$ 2,112,852	$ 2,601,013
Total derivative assets	62,711	78,129
Financial liabilities
Total derivative liabilities	10,100	12,598
U.S. Treasury
Financial assets
Investment securities available-for-sale, at fair value	13,355	47,017
Agency
Financial assets
Investment securities available-for-sale, at fair value	417,731	431,438
Corporate
Financial assets
Investment securities available-for-sale, at fair value	508,189	542,548
Collateralized mortgage obligations
Financial assets
Investment securities available-for-sale, at fair value	372,632	764,229
Mortgage-backed securities
Financial assets
Investment securities available-for-sale, at fair value	800,945	815,781
Level 1
Financial assets
Investment securities available-for-sale, at fair value	0	0
Equity securities	962	925
Total derivative assets	37	1
Financial liabilities
Total derivative liabilities	8	1
Level 2
Financial assets
Investment securities available-for-sale, at fair value	2,112,852	2,601,013
Equity securities	0	0
Total derivative assets	5,630	7,053
Financial liabilities
Total derivative liabilities	10,569	12,530
Level 3
Financial assets
Investment securities available-for-sale, at fair value	0	0
Equity securities	0	0
Total derivative assets	412	1,894
Financial liabilities
Total derivative liabilities	0	0
Recurring
Financial assets
Investment securities available-for-sale, at fair value	2,112,852	2,601,013
Equity securities	962	13,526
Total derivative assets	6,079	8,948
Financial liabilities
Total derivative liabilities	10,577	12,531
Equity securities that are measured at NAV		12,600
Recurring \| Foreign exchange contracts
Financial assets
Total derivative assets	37	1
Financial liabilities
Total derivative liabilities	8	1
Recurring \| Interest rate swaps contracts
Financial assets
Total derivative assets	5,630	7,053
Financial liabilities
Total derivative liabilities	10,569	12,530
Recurring \| Equity warrants
Financial assets
Total derivative assets	412	1,894
Recurring \| U.S. Treasury
Financial assets
Investment securities available-for-sale, at fair value	13,355	47,017
Recurring \| Agency
Financial assets
Investment securities available-for-sale, at fair value	417,731	431,438
Recurring \| Corporate
Financial assets
Investment securities available-for-sale, at fair value	508,189	542,548
Recurring \| Collateralized mortgage obligations
Financial assets
Investment securities available-for-sale, at fair value	372,632	764,229
Recurring \| Mortgage-backed securities
Financial assets
Investment securities available-for-sale, at fair value	800,945	815,781
Recurring \| Level 1
Financial assets
Investment securities available-for-sale, at fair value	0	0
Equity securities	962	925
Total derivative assets	37	1
Financial liabilities
Total derivative liabilities	8	1
Recurring \| Level 1 \| Foreign exchange contracts
Financial assets
Total derivative assets	37	1
Financial liabilities
Total derivative liabilities	8	1
Recurring \| Level 1 \| Interest rate swaps contracts
Financial assets
Total derivative assets	0	0
Financial liabilities
Total derivative liabilities	0	0
Recurring \| Level 1 \| Equity warrants
Financial assets
Total derivative assets	0	0
Recurring \| Level 1 \| U.S. Treasury
Financial assets
Investment securities available-for-sale, at fair value	0	0
Recurring \| Level 1 \| Agency
Financial assets
Investment securities available-for-sale, at fair value	0	0
Recurring \| Level 1 \| Corporate
Financial assets
Investment securities available-for-sale, at fair value	0	0
Recurring \| Level 1 \| Collateralized mortgage obligations
Financial assets
Investment securities available-for-sale, at fair value	0	0
Recurring \| Level 1 \| Mortgage-backed securities
Financial assets
Investment securities available-for-sale, at fair value	0	0
Recurring \| Level 2
Financial assets
Investment securities available-for-sale, at fair value	2,112,852	2,601,013
Equity securities	0	0
Total derivative assets	5,630	7,053
Financial liabilities
Total derivative liabilities	10,569	12,530
Recurring \| Level 2 \| Foreign exchange contracts
Financial assets
Total derivative assets	0	0
Financial liabilities
Total derivative liabilities	0	0
Recurring \| Level 2 \| Interest rate swaps contracts
Financial assets
Total derivative assets	5,630	7,053
Financial liabilities
Total derivative liabilities	10,569	12,530
Recurring \| Level 2 \| Equity warrants
Financial assets
Total derivative assets	0	0
Recurring \| Level 2 \| U.S. Treasury
Financial assets
Investment securities available-for-sale, at fair value	13,355	47,017
Recurring \| Level 2 \| Agency
Financial assets
Investment securities available-for-sale, at fair value	417,731	431,438
Recurring \| Level 2 \| Corporate
Financial assets
Investment securities available-for-sale, at fair value	508,189	542,548
Recurring \| Level 2 \| Collateralized mortgage obligations
Financial assets
Investment securities available-for-sale, at fair value	372,632	764,229
Recurring \| Level 2 \| Mortgage-backed securities
Financial assets
Investment securities available-for-sale, at fair value	800,945	815,781
Recurring \| Level 3
Financial assets
Investment securities available-for-sale, at fair value	0	0
Equity securities	0	0
Total derivative assets	412	1,894
Financial liabilities
Total derivative liabilities	0	0
Recurring \| Level 3 \| Foreign exchange contracts
Financial assets
Total derivative assets	0	0
Financial liabilities
Total derivative liabilities	0	0
Recurring \| Level 3 \| Interest rate swaps contracts
Financial assets
Total derivative assets	0	0
Financial liabilities
Total derivative liabilities	0	0
Recurring \| Level 3 \| Equity warrants
Financial assets
Total derivative assets	412	1,894
Recurring \| Level 3 \| U.S. Treasury
Financial assets
Investment securities available-for-sale, at fair value	0	0
Recurring \| Level 3 \| Agency
Financial assets
Investment securities available-for-sale, at fair value	0	0
Recurring \| Level 3 \| Corporate
Financial assets
Investment securities available-for-sale, at fair value	0	0
Recurring \| Level 3 \| Collateralized mortgage obligations
Financial assets
Investment securities available-for-sale, at fair value	0	0
Recurring \| Level 3 \| Mortgage-backed securities
Financial assets
Investment securities available-for-sale, at fair value	$ 0	$ 0

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