Fair Value of Financial Instruments - Hierarchy Table on Recurring Basis (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Financial assets
Investment securities available-for-sale, at fair value	$ 2,601,013	$ 4,273,864
Total derivative assets	78,129	11,989
Financial liabilities
Derivative liabilities	12,598	5,263
US Treasury Securities [Member]
Financial assets
Investment securities available-for-sale, at fair value	47,017	57,866
Agency
Financial assets
Investment securities available-for-sale, at fair value	431,438	432,135
Corporate
Financial assets
Investment securities available-for-sale, at fair value	542,548	453,861
Municipal bonds
Financial assets
Investment securities available-for-sale, at fair value		1,089,913
Collateralized mortgage obligations
Financial assets
Investment securities available-for-sale, at fair value	764,229	676,643
Mortgage-backed securities
Financial assets
Investment securities available-for-sale, at fair value	815,781	1,563,446
Recurring
Financial assets
Investment securities available-for-sale, at fair value	2,601,013	4,273,864
Equity securities	13,526
Total derivative assets	8,948	11,989
Financial liabilities
Derivative liabilities	12,531
Equity securities that are measured at NAV	12,600
Recurring \| Foreign exchange contracts
Financial assets
Total derivative assets	1
Financial liabilities
Derivative liabilities	1
Recurring \| Interest rate swap contracts
Financial assets
Total derivative assets	7,053	10,100
Financial liabilities
Derivative liabilities	12,530	5,263
Recurring \| Equity warrants
Financial assets
Total derivative assets	1,894	1,889
Recurring \| US Treasury Securities [Member]
Financial assets
Investment securities available-for-sale, at fair value	47,017	57,866
Recurring \| Agency
Financial assets
Investment securities available-for-sale, at fair value	431,438	432,135
Recurring \| Corporate
Financial assets
Investment securities available-for-sale, at fair value	542,548	453,861
Recurring \| Municipal bonds
Financial assets
Investment securities available-for-sale, at fair value		1,089,913
Recurring \| Collateralized mortgage obligations
Financial assets
Investment securities available-for-sale, at fair value	764,229	676,643
Recurring \| Mortgage-backed securities
Financial assets
Investment securities available-for-sale, at fair value	815,781	1,563,446
Level 1
Financial assets
Investment securities available-for-sale, at fair value	0	0
Equity securities	925
Total derivative assets	1	0
Financial liabilities
Derivative liabilities	1	0
Level 1 \| Recurring
Financial assets
Investment securities available-for-sale, at fair value	0	0
Equity securities	925
Total derivative assets	1	0
Financial liabilities
Derivative liabilities	1
Level 1 \| Recurring \| Foreign exchange contracts
Financial assets
Total derivative assets	1
Financial liabilities
Derivative liabilities	1
Level 1 \| Recurring \| Interest rate swap contracts
Financial assets
Total derivative assets	0	0
Financial liabilities
Derivative liabilities	0	0
Level 1 \| Recurring \| Equity warrants
Financial assets
Total derivative assets	0	0
Level 1 \| Recurring \| US Treasury Securities [Member]
Financial assets
Investment securities available-for-sale, at fair value	0	0
Level 1 \| Recurring \| Agency
Financial assets
Investment securities available-for-sale, at fair value	0	0
Level 1 \| Recurring \| Corporate
Financial assets
Investment securities available-for-sale, at fair value	0	0
Level 1 \| Recurring \| Municipal bonds
Financial assets
Investment securities available-for-sale, at fair value		0
Level 1 \| Recurring \| Collateralized mortgage obligations
Financial assets
Investment securities available-for-sale, at fair value	0	0
Level 1 \| Recurring \| Mortgage-backed securities
Financial assets
Investment securities available-for-sale, at fair value	0	0
Level 2
Financial assets
Investment securities available-for-sale, at fair value	2,601,013	4,273,864
Equity securities	0
Total derivative assets	7,053	10,100
Financial liabilities
Derivative liabilities	12,530	5,263
Level 2 \| Recurring
Financial assets
Investment securities available-for-sale, at fair value	2,601,013	4,273,864
Equity securities	0
Total derivative assets	7,053	10,100
Financial liabilities
Derivative liabilities	12,530
Level 2 \| Recurring \| Foreign exchange contracts
Financial assets
Total derivative assets	0
Financial liabilities
Derivative liabilities	0
Level 2 \| Recurring \| Interest rate swap contracts
Financial assets
Total derivative assets	7,053	10,100
Financial liabilities
Derivative liabilities	12,530	5,263
Level 2 \| Recurring \| Equity warrants
Financial assets
Total derivative assets	0	0
Level 2 \| Recurring \| US Treasury Securities [Member]
Financial assets
Investment securities available-for-sale, at fair value	47,017	57,866
Level 2 \| Recurring \| Agency
Financial assets
Investment securities available-for-sale, at fair value	431,438	432,135
Level 2 \| Recurring \| Corporate
Financial assets
Investment securities available-for-sale, at fair value	542,548	453,861
Level 2 \| Recurring \| Municipal bonds
Financial assets
Investment securities available-for-sale, at fair value		1,089,913
Level 2 \| Recurring \| Collateralized mortgage obligations
Financial assets
Investment securities available-for-sale, at fair value	764,229	676,643
Level 2 \| Recurring \| Mortgage-backed securities
Financial assets
Investment securities available-for-sale, at fair value	815,781	1,563,446
Level 3
Financial assets
Investment securities available-for-sale, at fair value	0	0
Equity securities	0
Total derivative assets	1,894	1,889
Financial liabilities
Derivative liabilities	0	0
Level 3 \| Recurring
Financial assets
Investment securities available-for-sale, at fair value	0	0
Equity securities	0
Total derivative assets	1,894	1,889
Financial liabilities
Derivative liabilities	0
Level 3 \| Recurring \| Foreign exchange contracts
Financial assets
Total derivative assets	0
Financial liabilities
Derivative liabilities	0
Level 3 \| Recurring \| Interest rate swap contracts
Financial assets
Total derivative assets	0	0
Financial liabilities
Derivative liabilities	0	0
Level 3 \| Recurring \| Equity warrants
Financial assets
Total derivative assets	1,894	1,889
Level 3 \| Recurring \| US Treasury Securities [Member]
Financial assets
Investment securities available-for-sale, at fair value	0	0
Level 3 \| Recurring \| Agency
Financial assets
Investment securities available-for-sale, at fair value	0	0
Level 3 \| Recurring \| Corporate
Financial assets
Investment securities available-for-sale, at fair value	0	0
Level 3 \| Recurring \| Municipal bonds
Financial assets
Investment securities available-for-sale, at fair value		0
Level 3 \| Recurring \| Collateralized mortgage obligations
Financial assets
Investment securities available-for-sale, at fair value	0	0
Level 3 \| Recurring \| Mortgage-backed securities
Financial assets
Investment securities available-for-sale, at fair value	$ 0	$ 0

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