Schedule II-Valuation and Qualifying Accounts (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Valuation Allowance on Deferred Tax Assets
Change in valuation and qualifying accounts
Balance at Beginning of Year	$ 5,665	$ 5,458	$ 6,021
Additions Charged to Expense	169	207
Deductions	(3,327)		(563)
Balance at End of Year	2,507	5,665	5,458
Reserve for Inventory Obsolescence
Change in valuation and qualifying accounts
Balance at Beginning of Year	16,679	8,801	2,862
Additions Charged to Expense	3,341	12,136	5,939
Deductions	(1,719)	(4,258)
Balance at End of Year	$ 18,301	$ 16,679	$ 8,801