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 [Member]
Balance Beginning of Year	$ 346	$ 1,058	$ 652
Charged/ to Cost and Expenses	(11)	61	433
Charged/ to Other Accounts	$ (31)	(130)	27
Deductions		643	54
Balance End of Year	$ 304	346	1,058
Valuation Allowance of Deferred Tax Assets [Member]
Balance Beginning of Year	5,053	29,890	29,941
Charged/ to Cost and Expenses	303	(26,543)	(97)
Charged/ to Other Accounts	$ (2,215)	$ 1,706	$ 46
Deductions
Balance End of Year	$ 3,141	$ 5,053	$ 29,890