Schedule II Valuation of Qualifying Accounts and Reserves (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Movement in Valuation Allowances and Reserves [Roll Forward]
Valuation Allowances and Reserves, Balance Beginning of Period	$ 829	$ 791	$ 775
Valuation Allowances and Reserves, Charged to Cost and Expense	(27)	205	83
Valuation Allowances and Reserves, Charged to Other Accounts	238	0	0
Valuation Allowances and Reserves, Deductions	12	167	67
Valuation Allowances and Reserves, Balance End of Period	$ 1,028	$ 829	$ 791