Accruals and Other Liabilities (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016
Accrued and Other Liabilities [Abstract]
Net Income (Loss) Attributable to Noncontrolling Interest	$ 3,491	$ 1,059	$ 6,588	$ 3,172	$ 5,218
Payments to Noncontrolling Interests			(5,272)	(6,549)	(7,772)
Beginning balance			4,154	$ 5,473	5,473
Other			332		1,235
Ending balance	$ 5,802		$ 5,802		$ 4,154