Debt, net - Schedule of Debt Obligations, Net of Discounts and Deferred Financing Costs (Details) - USD ($) $ in Thousands	9 Months Ended
Sep. 30, 2021	Dec. 31, 2020
Debt Instrument [Line Items]
Long-term debt	$ 386,663	$ 379,617
Unamortized discount, net	(1,599)	(2,035)
Unamortized deferred financing costs	(10,222)	(11,336)
Debt, net	374,842	366,246
Total corporate debt
Debt Instrument [Line Items]
Long-term debt	277,365	280,313
Asset based revolving financing
Debt Instrument [Line Items]
Debt instrument, maximum borrowing capacity	200,000
Long-term debt	$ 1,740	0
Asset based revolving financing \| Prime Rate
Debt Instrument [Line Items]
Basis spread on variable rate	1.25%
Asset based revolving financing \| LIBOR
Debt Instrument [Line Items]
Basis spread on variable rate	2.25%
Secured term credit agreements
Debt Instrument [Line Items]
Debt instrument, maximum borrowing capacity	$ 115,625
Long-term debt	$ 115,625	120,313
Secured term credit agreements \| LIBOR
Debt Instrument [Line Items]
Basis spread on variable rate	6.75%
Floor rate	1.00%
Preferred trust securities
Debt Instrument [Line Items]
Debt instrument, maximum borrowing capacity	$ 35,000
Long-term debt	$ 35,000	35,000
Preferred trust securities \| LIBOR
Debt Instrument [Line Items]
Basis spread on variable rate	4.10%
Junior subordinated notes
Debt Instrument [Line Items]
Stated interest rate, percentage	8.50%
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	$ 109,298	$ 99,304
Residential mortgage warehouse borrowings
Debt Instrument [Line Items]
Weighted average interest rate	2.25%	2.75%
Asset Backed Revolving Line of Credit \| Asset based revolving financing
Debt Instrument [Line Items]
Debt instrument, maximum borrowing capacity	$ 75,000
Long-term debt	$ 33,350	$ 27,510
Asset Backed Revolving Line of Credit \| Asset based revolving financing \| LIBOR
Debt Instrument [Line Items]
Basis spread on variable rate	2.75%
Warehouse Agreement Borrowings \| Residential mortgage warehouse borrowings
Debt Instrument [Line Items]
Debt instrument, maximum borrowing capacity	$ 110,000
Long-term debt	$ 61,798	55,994
Warehouse Agreement Borrowings \| Minimum \| Residential mortgage warehouse borrowings \| LIBOR
Debt Instrument [Line Items]
Basis spread on variable rate	1.88%
Floor rate	0.50%
Warehouse Agreement Borrowings \| Maximum \| Residential mortgage warehouse borrowings \| LIBOR
Debt Instrument [Line Items]
Basis spread on variable rate	0.03%
Floor rate	1.00%
Asset Backed Term Loan - Vessels \| Vessel backed term loan
Debt Instrument [Line Items]
Debt instrument, maximum borrowing capacity	$ 14,150
Long-term debt	$ 14,150	$ 15,800
Asset Backed Term Loan - Vessels \| Vessel backed term loan \| LIBOR
Debt Instrument [Line Items]
Basis spread on variable rate	4.75%

Debt Instrument, Floor Interest Rate

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- Definition

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.

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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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- 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.

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- Definition

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

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