Allowance for Credit and Loan Losses - Allowance for Loan Losses (Details) - USD ($) $ in Thousands		12 Months Ended
	Jan. 01, 2020	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Financing Receivable, Allowance for Credit Loss [Line Items]
Balance, beginning of period	$ 17,667	$ 57,027	$ 17,667
Credit loss expense (recovery)		(2,084)	20,751	$ 1,976
Initial PCD allowance			(2,786)
PCD loans charge–offs		984	(2,105)
Charge–offs		(2,799)	(3,026)
Recoveries		1,158	1,163
Balance, end of period	22,577	54,286	57,027	17,667
Mortgage warehouse
Financing Receivable, Allowance for Credit Loss [Line Items]
Balance, beginning of period	1,077	1,267	1,077
Credit loss expense (recovery)		(208)	190
Initial PCD allowance			0
PCD loans charge–offs		0	0
Charge–offs		0	0
Recoveries		0	0
Balance, end of period	0	1,059	1,267	1,077
Impact of adopting ASC 326
Financing Receivable, Allowance for Credit Loss [Line Items]
Balance, beginning of period	19,791		19,791
Balance, end of period	17,667			19,791
Impact of adopting ASC 326 | Mortgage warehouse
Financing Receivable, Allowance for Credit Loss [Line Items]
Balance, beginning of period	0		0
Balance, end of period	1,077			0
Commercial
Financing Receivable, Allowance for Credit Loss [Line Items]
Balance, beginning of period	11,996	42,210	11,996
Credit loss expense (recovery)		(1,320)	19,198
Initial PCD allowance			(2,786)
PCD loans charge–offs		984	(2,105)
Charge–offs		(1,368)	(653)
Recoveries		269	156
Balance, end of period		40,775	42,210	11,996
Commercial | Impact of adopting ASC 326
Financing Receivable, Allowance for Credit Loss [Line Items]
Balance, beginning of period	10,832		10,832
Balance, end of period				10,832
Real Estate
Financing Receivable, Allowance for Credit Loss [Line Items]
Balance, beginning of period	923	4,620	923
Credit loss expense (recovery)		(755)	(184)
Initial PCD allowance			0
PCD loans charge–offs		0	0
Charge–offs		(159)	(204)
Recoveries		150	37
Balance, end of period		3,856	4,620	923
Real Estate | Impact of adopting ASC 326
Financing Receivable, Allowance for Credit Loss [Line Items]
Balance, beginning of period	4,048		4,048
Balance, end of period				4,048
Consumer
Financing Receivable, Allowance for Credit Loss [Line Items]
Balance, beginning of period	3,671	8,930	3,671
Credit loss expense (recovery)		199	1,547
Initial PCD allowance			0
PCD loans charge–offs		0	0
Charge–offs		(1,272)	(2,169)
Recoveries		739	970
Balance, end of period		$ 8,596	8,930	3,671
Consumer | Impact of adopting ASC 326
Financing Receivable, Allowance for Credit Loss [Line Items]
Balance, beginning of period	$ 4,911		$ 4,911
Balance, end of period				$ 4,911