SCHEDULE II-VALUATION AND QUALIFYING ACCOUNTS (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Period	$ 2,685	$ 2,129	$ 1,554
Charged to Expense	1,949	1,984	1,285
(Uncollectible Accounts Written Off, Net of Recoveries)	(3,403)	(1,427)	(710)
Other	0	0	0
Balance at End of Period	$ 1,231	$ 2,685	$ 2,129