Debt, net - Schedule of Debt Obligations, Net of Discounts and Deferred Financing Costs (Details) - USD ($) $ in Thousands	3 Months Ended
Mar. 31, 2021	Dec. 31, 2020
Debt Instrument [Line Items]
Long-term debt	$ 406,788	$ 379,617
Unamortized discount, net	(1,888)	(2,035)
Unamortized deferred financing costs	(10,941)	(11,336)
Debt, net	393,959	366,246
Total corporate debt
Debt Instrument [Line Items]
Long-term debt	299,130	280,313
Asset based revolving financing
Debt Instrument [Line Items]
Debt instrument, maximum borrowing capacity	200,000
Long-term debt	$ 20,380	0
Asset based revolving financing \| Prime Rate
Debt Instrument [Line Items]
Basis spread on variable rate	1.25%
Secured term credit agreements
Debt Instrument [Line Items]
Debt instrument, maximum borrowing capacity	$ 118,750
Long-term debt	118,750	120,313
Preferred trust securities
Debt Instrument [Line Items]
Debt instrument, maximum borrowing capacity	35,000
Long-term debt	35,000	35,000
Junior subordinated notes
Debt Instrument [Line Items]
Debt instrument, maximum borrowing capacity	125,000
Long-term debt	125,000	125,000
Total asset based debt
Debt Instrument [Line Items]
Long-term debt	107,658	$ 99,304
Residential mortgage warehouse borrowings
Debt Instrument [Line Items]
Debt instrument, maximum borrowing capacity	$ 110,000
Weighted average interest rate	2.77%	2.75%
Minimum \| Residential mortgage warehouse borrowings \| LIBOR
Debt Instrument [Line Items]
Basis spread on variable rate	2.00%
Maximum \| Asset based revolving financing \| Prime Rate
Debt Instrument [Line Items]
Basis spread on variable rate	1.25%
Maximum \| Asset based revolving financing \| LIBOR
Debt Instrument [Line Items]
Basis spread on variable rate	2.25%
Maximum \| Secured term credit agreements \| LIBOR
Debt Instrument [Line Items]
Basis spread on variable rate	6.75%
Maximum \| Preferred trust securities
Debt Instrument [Line Items]
Basis spread on variable rate	4.10%
Maximum \| Junior subordinated notes
Debt Instrument [Line Items]
Stated interest rate, percentage	8.50%
Maximum \| Residential mortgage warehouse borrowings \| LIBOR
Debt Instrument [Line Items]
Basis spread on variable rate	3.00%
Asset Backed Revolving Line of Credit \| Asset based revolving financing
Debt Instrument [Line Items]
Debt instrument, maximum borrowing capacity	$ 75,000
Long-term debt	$ 26,830	$ 27,510
Asset Backed Revolving Line of Credit \| Maximum \| Asset based revolving financing \| LIBOR
Debt Instrument [Line Items]
Basis spread on variable rate	2.75%
Asset Backed Term Loan - Vessels \| Vessel backed term loan
Debt Instrument [Line Items]
Debt instrument, maximum borrowing capacity	$ 15,250
Long-term debt	$ 15,250	15,800
Asset Backed Term Loan - Vessels \| Maximum \| Vessel backed term loan \| LIBOR
Debt Instrument [Line Items]
Basis spread on variable rate	4.75%
Warehouse Agreement Borrowings \| Residential mortgage warehouse borrowings
Debt Instrument [Line Items]
Long-term debt	$ 65,578	$ 55,994

Debt instrument, maximum borrowing capacity

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- Definition

Percentage points added to the reference rate to compute the variable rate on the debt instrument.

+ References

No definition available.

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- Definition

Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.

+ References

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-Publisher FASB
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- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Amount, after accumulated amortization, of debt discount.

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- Definition

Amount, after accumulated amortization, of debt issuance costs. Includes, but is not limited to, legal, accounting, underwriting, printing, and registration costs.

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- Definition

Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition

Weighted average interest rate of long-term debt outstanding calculated at point in time.

+ References

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