Schedule II - Valuation and Qualifying Accounts (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Allowance for Doubtful Accounts
Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at Beginning of Period	$ 388	$ 865	$ 819
Credited / Charged to Net Income	2,085	947	839
Charges utilized / Write- offs	(1,315)	(1,424)	(793)
Balance at End of Period	1,158	388	865
Valuation Allowance of Deferred Tax Assets
Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at Beginning of Period	6,945	5,194	1,547
Credited / Charged to Net Income		1,751	2,451
Balance Acquired			1,196
Charges utilized / Write- offs	(1,669)
Balance at End of Period	$ 5,276	$ 6,945	$ 5,194