Acquisitions and Divestitures - Additional Information (Details) $ in Thousands			3 Months Ended			12 Months Ended
	Jun. 01, 2021 USD ($)	Jul. 08, 2020 USD ($) client shares	Mar. 31, 2022 USD ($) branch	Mar. 31, 2021 USD ($)	Sep. 30, 2020 USD ($)	Dec. 31, 2020 USD ($)	Dec. 31, 2021 USD ($)	Jun. 30, 2021 USD ($)	Sep. 23, 2020 USD ($) shares
Business Acquisition [Line Items]
Goodwill			$ 230,492				$ 233,727
Loans			4,724,078				4,867,572
Indemnification asset			4,582				4,786
Loans, net			4,682,525				4,825,359
Gain on indemnification asset				$ 4,654
Indemnification asset, expected cash payments to be received			4,823				5,038
Factored receivables
Business Acquisition [Line Items]
Loans			1,764,590				1,699,537
Past Due 30-59 Days
Business Acquisition [Line Items]
Loans			52,687				73,519
Past Due 30-59 Days | Factored receivables
Business Acquisition [Line Items]
Loans			50,389				70,109
Past Due 60-90 Days
Business Acquisition [Line Items]
Loans			21,248				19,182
Past Due 60-90 Days | Factored receivables
Business Acquisition [Line Items]
Loans			20,082				18,302
Past Due 90 Days or More
Business Acquisition [Line Items]
Loans			55,030				46,433
Past Due 90 Days or More | Factored receivables
Business Acquisition [Line Items]
Loans			47,719				39,134
Disposal Group, Held-for-sale, Not Discontinued Operations | Branch Disposal Group
Business Acquisition [Line Items]
Reversal of allowance for credit losses			971
Total loans			$ 159,169
Number of branches sold | branch			15
Disposal Group, Held-for-sale, Not Discontinued Operations | Factored Receivable Disposal Group | Factored receivables
Business Acquisition [Line Items]
Reversal of allowance for credit losses			$ 415
Total loans			80,819
Disposal Group, Held-for-sale, Not Discontinued Operations | Factored Receivable Disposal Group | Past Due 30-59 Days | Factored receivables
Business Acquisition [Line Items]
Total loans			4,899
Disposal Group, Held-for-sale, Not Discontinued Operations | Factored Receivable Disposal Group | Past Due 60-90 Days | Factored receivables
Business Acquisition [Line Items]
Total loans			1,962
Disposal Group, Held-for-sale, Not Discontinued Operations | Factored Receivable Disposal Group | Past Due 90 Days or More | Factored receivables
Business Acquisition [Line Items]
Total loans			767
Fair Value, Measurements, Recurring
Business Acquisition [Line Items]
Indemnification asset			4,582				4,786
Level 3 | Fair Value, Measurements, Recurring
Business Acquisition [Line Items]
Indemnification asset			4,582				4,786
Over-Formula Advances | Factored receivables
Business Acquisition [Line Items]
Loans			9,646				$ 10,077
HubTran, Inc.
Business Acquisition [Line Items]
Goodwill	$ 73,697		70,441
Business acquisition, transaction costs								$ 2,992
Cash paid	97,096
HubTran, Inc. | Capitalized Software
Business Acquisition [Line Items]
Intangible assets	16,932		$ 16,932
Intangible asset, estimated useful life			4 years
HubTran, Inc. | Customer Relationships
Business Acquisition [Line Items]
Intangible assets	$ 10,360		$ 10,360
Intangible asset, estimated useful life			11 years
Transport Financial Solutions
Business Acquisition [Line Items]
Goodwill		$ 4,466	$ 4,525
Intangible asset, estimated useful life		8 years
Cash paid		$ 108,375
Number of common stock (in shares) | shares		630,268
Stock consideration		$ 13,942
Number of large clients | client		3
Portion of purchase price returned (in shares) | shares									630,268
Cash due from seller subsequent to liquidation of stock consideration		$ 17,196
Proceeds from sale of acquired stock						$ 28,064
Noninterest income, other					$ 2,007	$ 10,868
Intangible assets		3,500	3,500
Indemnification asset		30,959	30,959
Charge -off				41,265
Credit loss expense				2,844
Reduction in required ACL				430
Factored receivables acquired, contractual amount		45,228
Factored receivables acquired, fair value		44,962
Acquisition related costs					$ 827
Transport Financial Solutions | CVLG
Business Acquisition [Line Items]
Loans, net				$ 35,633
Transport Financial Solutions | Indemnification Agreement
Business Acquisition [Line Items]
Percent indemnified, first $30 million of losses									100.00%
First increment of losses incurred									$ 30,000
Percent indemnified, second $30 million of losses									50.00%
Second increment of losses incurred									$ 30,000
Total indemnification amount									45,000
Net orderly liquidation value									60,000
Transport Financial Solutions | Indemnification Agreement | CVLG
Business Acquisition [Line Items]
Unsecured federal funds line of credit									45,000
Unused borrowing capacity			$ 9,361
Transport Financial Solutions | Over-Formula Advances
Business Acquisition [Line Items]
Loans		62,200							$ 62,200
Transport Financial Solutions | Maximum
Business Acquisition [Line Items]
Fair value of consideration paid included contingent consideration		$ 9,900