Schedule II - Valuation and Qualifying Accounts (Details) - Valuation and Qualifying Accounts (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Allowance for Doubtful Accounts [Member]
Valuation Allowance [Line Items]
Balance at Beginning of Period	$ 2,064	$ 2,314	$ 1,051
Charged to Costs and Expenses	432	140	1,853
Charged to Other Accounts	0	0	0
Deductions	(1,766)	(390)	(590)
Balance at End of Period	730	2,064	2,314
Valuation Allowance of Deferred Tax Assets [Member]
Valuation Allowance [Line Items]
Balance at Beginning of Period	3,157	4,620	4,871
Charged to Costs and Expenses	92	4	198
Charged to Other Accounts	0	0	0
Deductions	(501)	(1,467)	(449)
Balance at End of Period	$ 2,748	$ 3,157	$ 4,620