Schedule II (Details) - Valuation and Qualifying Accounts (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Valuation and Qualifying Accounts [Abstract]
Beginning Balance	$ 4,359	$ 2,662	$ 815
Charged to Costs and Expenses	4,751	2,852	2,297
Deductions	(1,656)	(1,370)	(450)
Acquisitions	(246)	215
Ending Balance	$ 7,208	$ 4,359	$ 2,662