Schedule II - Valuation And Qualifying Accounts (Details) - Allowance for Doubtful Accounts - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at Beginning of Period		$ 2,032	$ 3,675	$ 2,780
Charged to Costs and Expenses	[1]	$ 2,850	$ 1,244	$ 2,103
Charged to Other Accounts	[2]
Deductions	[3]	$ (2,212)	$ (2,887)	$ (1,208)
Balance at End of Period		$ 2,670	$ 2,032	$ 3,675

[1] Charges relate to provisions for doubtful accounts

[2] Reflects the impact of acquisitions

[3] Deductions relate to the write-off of accounts receivable deemed uncollectible