Significant Accounting Policies (Details) - USD ($)	3 Months Ended		12 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Dec. 31, 2016
Significant Accounting Policies [Line Items]
Option to purchase noncontrolling interest impairment charge	$ 0	$ 0
Beginning Balance	60,180,000
Granted	63,000
Ending Balance	60,383,000		$ 60,180,000
Redeemable Noncontrolling Interest [Member]
Significant Accounting Policies [Line Items]
Beginning Balance	60,180,000	$ 69,471,000	69,471,000
Redemptions	(63,000)		(1,708,000)
Granted	0		2,274,000
Changes in redemption value	195,000		(9,604,000)
Currency Translation Adjustments	71,000		(253,000)
Ending Balance	$ 60,383,000		$ 60,180,000