SCHEDULE II Valuation and Qualifying Accounts (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Allowance for Doubtful Accounts
Balance at Beginning of Period	$ 476	$ 1,655	$ 1,773
Charged to (Reduction of) Costs and Expenses	1,085	250	670
Taken Against Allowance	(866)	(1,429)	(788)
Other (Deductions) Recoveries	0	0	0
Balance at End of Period	695	476	1,655
Valuation on Allowance for Deferred Tax Assets
Balance at Beginning of Period	7,691	7,302	7,992
Charged to (Reduction of) Costs and Expenses	(1,484)	159	(85)
Taken Against Allowance	0	0	0
Other (Deductions) Recoveries	(5)	230	(605)
Balance at End of Period	$ 6,202	$ 7,691	$ 7,302