Agreements and Transactions with Related Parties - Related Party Income, by Program (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Related Party Transaction
Revenue from related parties	$ 58,641	$ 44,753	$ 121,336	$ 105,149
CPA: 17 - Global
Related Party Transaction
Revenue from related parties	23,191	17,012	40,262	35,204
CPA:18 - Global
Related Party Transaction
Revenue from related parties	6,116	9,051	14,319	17,592
CWI
Related Party Transaction
Revenue from related parties	7,254	7,233	14,111	18,682
CWI 2
Related Party Transaction
Revenue from related parties	9,098	8,775	33,563	29,309
CCIF
Related Party Transaction
Revenue from related parties	6,049	2,682	10,990	4,362
CESH I
Related Party Transaction
Revenue from related parties	$ 6,933	$ 0	$ 8,091	$ 0