Schedule II - Valuation and Qualifying Accounts (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Allowance for Doubtful Accounts
Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at Beginning of Period	$ 865	$ 819	$ 221
Credited / Charged to Net Income	947	839	805
Balance Acquired			335
Charges utilized / Write- offs	(1,424)	(793)	(542)
Balance at End of Period	388	865	819
Valuation Allowance of Deferred Tax Assets
Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at Beginning of Period	5,194	1,547	431
Credited / Charged to Net Income	1,751	2,451	(18)
Balance Acquired		1,196	1,399
Charges utilized / Write- offs			(265)
Balance at End of Period	$ 6,945	$ 5,194	$ 1,547