Schedule II - Valuation and Qualifying Accounts (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Allowance for Doubtful Accounts [Member]
Balance at beginning of period	$ 5,063	$ 3,748	$ 945
Charge to expenses	1,752	1,323	600
Additions/(deductions)	(2,598)	(8)	2,203
Balance at end of period	$ 4,217	5,063	3,748
Valuation Allowance for Deferred Tax Assets [Member]
Balance at beginning of period		3,395	1,365
Additions/(deductions)		$ (3,395)	2,030
Balance at end of period			$ 3,395