Interest income and interest expense (Details) - USD ($) $ in Thousands	3 Months Ended
Mar. 31, 2020	Mar. 31, 2019
Interest income
Total loans	$ 66,436	$ 46,202
Total loans, held for sale, at fair value	1,636	1,069
Mortgage backed securities, at fair value	1,479	1,482
Total interest income	69,551	48,753
Interest expense
Secured borrowings	(12,758)	(9,909)
Securitized debt obligations of consolidated VIEs	(19,529)	(16,501)
Guaranteed loan financing	(6,243)	(2,710)
Senior secured note	(3,472)	(3,484)
Convertible note	(2,188)	(2,188)
Corporate debt	(2,740)	(983)
Total interest expense	(46,930)	(35,775)
Net interest income before provision for loan losses	22,621	12,978
Acquired SBA 7(a) loans
Interest income
Total loans	6,202	7,181
Acquired loans
Interest income
Total loans	15,411	10,254
Total loans, held for sale, at fair value	68	36
Originated Transitional loans
Interest income
Total loans	22,219	14,185
Originated SBC loans, at fair value
Interest income
Total loans	317	366
Originated SBC loans
Interest income
Total loans	15,998	12,282
Originated SBA 7(a) loans
Interest income
Total loans	6,269	1,928
Originated Residential Agency loans
Interest income
Total loans	20	6
Total loans, held for sale, at fair value	1,297	776
Originated Freddie Mac loans
Interest income
Total loans, held for sale, at fair value	$ 271	$ 257

Interest expense incurred during the reporting period on convertible note.

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Interest expense incurred during the reporting period on Corporate Debt.

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Aggregate amount of interest expense on senior secured note.

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No definition available.

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- Definition

This element represents interest incurred for borrowed money which was used to produce goods or render services.

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Represents the total of interest and dividend income, including any amortization and accretion (as applicable) of discounts and premiums, earned from (1) loans and leases whether held-for-sale or held-in-portfolio; (2) investment securities; (3) federal funds sold; (4) securities purchased under agreements to resell; (5) investments in banker's acceptances, commercial paper, or certificates of deposit; (6) dividend income; or (7) other investments not otherwise specified herein.

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The aggregate interest and fee income generated by: (1) loans the Entity has positive intent and ability to hold for the foreseeable future, or until maturity or payoff, including commercial and consumer loans, whether domestic or foreign, which may consist of: (a) industrial and agricultural; (b) real estate; and (c) real estate construction loans; (d) trade financing; (e) lease financing; (f) home equity lines-of-credit; (g) automobile and other vehicle loans; and (h) credit card and other revolving-type loans and (2) loans and leases held-for-sale which may include mortgage loans, direct financing, and sales-type leases.

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The amount of interest and fee income earned from loans held-for-sale, including mortgage loans, and interest earned from direct financing and sales-type leases held-for-sale.

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Amount of the cost of borrowed funds accounted for as interest expense.

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Interest expense on beneficial interests issued by consolidated variable interest entities.

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- Definition

The aggregate interest expense incurred on short-term borrowings including commercial paper and Federal funds purchased and securities sold under agreements to repurchase.

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The net amount of operating interest income (expense).

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Amount of operating interest income, including amortization and accretion of premiums and discounts, on securitized, pass-through debt securities collateralized by real estate mortgage loans.

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