SCHEDULE II - VALUATIONS AND QUALIFYING ACCOUNTS (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Allowance for Doubtful Accounts Receivable [Roll Forward]
Balance Beginning of Year	$ 1,860	$ 2,695	$ 1,606
Additions Charged to Cost & Expenses	173	717	1,581
Deductions Written Off as Uncollectible	(1,398)	(1,552)	(492)
Balance End of Year	$ 635	$ 1,860	$ 2,695