Significant Accounting Policies (Details) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2015	Dec. 31, 2014
Accounting Policies [Abstract]
Beginning Balance	$ 194,951	$ 148,534
Redemptions	(152,166)	(4,820)
Granted	7,703	13,327
Changes in redemption value	21,596	38,850
Currency Translation Adjustments	(758)	(940)
Ending Balance	$ 71,326	$ 194,951