Significant Accounting Policies - Schedule of Interest Income and Interest Expense (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Accounting Policies [Abstract]
Interest Income	$ 12,519	$ 12,666	$ 14,363
Interest Expense	(10,894)	(14,794)	(13,742)
Interest, net	$ 1,625	$ (2,128)	$ 621