Allowance for Credit and Loan Losses - Allowance for Loan Losses (Details) - USD ($) $ in Thousands		12 Months Ended
	Jan. 01, 2020	Dec. 31, 2020
Financing Receivable, Allowance for Credit Loss [Line Items]
Balance, beginning of period	$ 17,667	$ 17,667
Provision for credit losses on loans		20,751
PCD loans charge–offs		(2,105)
Charge–offs		(3,026)
Recoveries		1,163
Balance, end of period	22,577	57,027
Impact of adopting ASC 326
Financing Receivable, Allowance for Credit Loss [Line Items]
Balance, beginning of period	22,577	22,577
Balance, end of period	17,667
Mortgage warehouse
Financing Receivable, Allowance for Credit Loss [Line Items]
Balance, beginning of period	1,077	1,077
Provision for credit losses on loans		190
PCD loans charge–offs		0
Charge–offs		0
Recoveries		0
Balance, end of period	0	1,267
Mortgage warehouse | Impact of adopting ASC 326
Financing Receivable, Allowance for Credit Loss [Line Items]
Balance, beginning of period	0	0
Balance, end of period	1,077
Commercial
Financing Receivable, Allowance for Credit Loss [Line Items]
Balance, beginning of period	11,996	11,996
Provision for credit losses on loans		19,198
PCD loans charge–offs		(2,105)
Charge–offs		(653)
Recoveries		156
Balance, end of period		42,210
Commercial | Impact of adopting ASC 326
Financing Receivable, Allowance for Credit Loss [Line Items]
Balance, beginning of period	13,618	13,618
Real estate
Financing Receivable, Allowance for Credit Loss [Line Items]
Balance, beginning of period	923	923
Provision for credit losses on loans		(184)
PCD loans charge–offs		0
Charge–offs		(204)
Recoveries		37
Balance, end of period		4,620
Real estate | Impact of adopting ASC 326
Financing Receivable, Allowance for Credit Loss [Line Items]
Balance, beginning of period	4,048	4,048
Consumer
Financing Receivable, Allowance for Credit Loss [Line Items]
Balance, beginning of period	3,671	3,671
Provision for credit losses on loans		1,547
PCD loans charge–offs		0
Charge–offs		(2,169)
Recoveries		970
Balance, end of period		8,930
Consumer | Impact of adopting ASC 326
Financing Receivable, Allowance for Credit Loss [Line Items]
Balance, beginning of period	$ 4,911	$ 4,911