Other income and operating expenses - Balance Sheet Impact of PPP Activities (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019	Jun. 30, 2019
Assets
Cash and cash equivalents	$ 257,017	$ 67,928	$ 41,925
Restricted cash	91,539	51,728	$ 38,019
Other assets
Accrued interest	9,332	10,583
Total Assets	5,460,932	4,977,018
Liabilities
Secured borrowings	1,253,895	1,189,392
Interest payable	19,476	17,305
Deferred LSP loan revenue	14,493
Accrued PPP Related Costs	5,077
Payable to third parties	15,000
Repair and denial reserve	7,947	5,179
Total Liabilities	4,647,886	$ 4,132,234
PPP Loans
Assets
Cash and cash equivalents	63,553
Restricted cash	23,513
Loans, held-for-investment, at fair value	105,248
Other assets
Prepaid expenses	826
PPP fee receivable	260
Accrued interest	88
Total Assets	193,488
Liabilities
Secured borrowings	100,012
Interest payable	926
Deferred LSP loan revenue	14,493
Accrued PPP Related Costs	5,077
Payable to third parties	40,554
Repair and denial reserve	2,319
Total Liabilities	$ 163,381