Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016
Cash flows from operating activities
Net income	$ 102,018	$ 126,649
Adjustments to reconcile net income to net cash provided by operating activities
Non-cash compensation expense	11,866	10,315
Amortization of deferred fees on loans	(16,796)	(20,360)
Amortization of deferred financing costs and premiums/discount on debt obligations	9,488	9,752
Income from equity investment in unconsolidated subsidiary		(133)
Distributions of income from unconsolidated subsidiary		6,837
Gain on investments at fair value		(10,589)
Changes in assets and liabilities, net
Other assets	(1,255)	4,248
Other liabilities	5,492	(3,424)
Net cash provided by operating activities	110,813	123,295
Cash flows from investing activities
Origination and fundings of loans receivable	(1,464,994)	(1,401,871)
Principal collections and sales proceeds from loans receivable and other assets	1,097,022	1,323,770
Origination and exit fees received on loans receivable	25,228	21,613
Receipts under derivative financial instruments	6,115
Payments under derivative financial instruments	(9,398)
Net cash used in investing activities	(346,027)	(56,488)
Cash flows from financing activities
Borrowings under secured debt agreements	1,744,766	1,508,171
Repayments under secured debt agreements	(1,673,886)	(1,328,131)
Proceeds from sale of loan participations		54,441
Repayment of loan participations		(92,000)
Payment of deferred financing costs	(9,800)	(9,316)
Receipts under derivative financial instruments		11,478
Payments under derivative financial instruments		(13,240)
Distributions to non-controlling interests		(6,987)
Net proceeds from issuance of convertible notes	280,473
Net proceeds from issuance of class A common stock	16	13
Dividends paid on class A common stock	(117,402)	(116,323)
Net cash provided by financing activities	224,167	8,106
Net (decrease) increase in cash, cash equivalents, and restricted cash	(11,047)	74,913
Cash, cash equivalents, and restricted cash at beginning of period	75,567	106,006
Effects of currency translation on cash, cash equivalents, and restricted cash	3,279	1,353
Cash, cash equivalents, and restricted cash at end of period	67,799	182,272
Supplemental disclosure of cash flows information
Payments of interest	(88,519)	(84,408)
Payments of income taxes	(141)	(204)
Supplemental disclosure of non-cash investing and financing activities
Dividends declared, not paid	(58,793)	(58,382)
Participations sold, net		(37,559)
Loan principal payments held by servicer, net	5,082	$ 35,947
Consolidation of loans receivable of a VIE	500,000
Consolidation of securitized debt obligations of a VIE	$ (474,620)