Significant Accounting Policies (Details) - USD ($)	3 Months Ended		12 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Dec. 31, 2015
Accounting Policies [Abstract]
Option to purchase noncontrolling interest impairment charge	$ 0	$ 0
Beginning Balance	69,471,000	$ 194,951,000	$ 194,951,000
Redemptions	0		(155,042,000)
Granted	0		7,703,000
Changes in redemption value	1,423,000		22,809,000
Currency Translation Adjustments	106,000		(950,000)
Ending Balance	$ 71,000,000		$ 69,471,000