Loans - Loans Held for Investment (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Financing Receivable, Allowance for Credit Loss [Line Items]
Total loans	$ 4,046,642	$ 3,856,281
Deferred costs, fees, premiums, and discounts	(9,519)	(9,924)
Allowance for loan losses	(47,547)	(47,766)	$ (28,546)	$ (26,399)
Total loans, net	3,989,576	3,798,591
Commercial
Financing Receivable, Allowance for Credit Loss [Line Items]
Total loans	2,414,787	2,181,552
Allowance for loan losses	(33,277)	(32,009)	(17,509)	(13,158)
Commercial real estate
Financing Receivable, Allowance for Credit Loss [Line Items]
Total loans	1,176,973	1,156,668
Allowance for loan losses	(12,899)	(13,863)	(9,645)	(11,774)
Residential real estate
Financing Receivable, Allowance for Credit Loss [Line Items]
Total loans	437,116	503,828
Allowance for loan losses	(1,136)	(1,606)	(1,056)	(1,201)
Consumer
Financing Receivable, Allowance for Credit Loss [Line Items]
Total loans	17,766	14,233
Allowance for loan losses	$ (235)	$ (288)	$ (336)	$ (266)

Amount excluding accrued interest, of allowance for credit loss on financing receivable.

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-Name Accounting Standards Codification
-Topic 326
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Amount excluding accrued interest, before allowance for credit loss, of financing receivable.

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
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