Schedule II -- Valuation and Qualifying Accounts (Consolidated) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Allowance for Doubtful Accounts
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at beginning of period	$ 5,307	$ 5,518	$ 7,457
Charged to expense or other accounts	661	367	457
Deductions	(265)	(578)	(2,396)
Balance at end of period	5,703	5,307	5,518
Allowance for Slow Moving and Obsolete Inventory
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at beginning of period	4,808	4,658	4,528
Charged to expense or other accounts	349	392	1,774
Deductions	(1,066)	(242)	(1,644)
Balance at end of period	4,091	4,808	4,658
Valuation Allowance for Deferred Tax Asset
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at beginning of period	76,452	72,327	98,989
Charged to expense or other accounts	3,218	4,125	(26,662)
Deductions	(2,041)	0	0
Balance at end of period	$ 77,629	$ 76,452	$ 72,327