Income Taxes (Deferred Tax Assets and Liabilities) (Details) (USD $)	Dec. 31, 2011	Dec. 31, 2010
Components of Deferred Tax Assets [Abstract]
Inventory	$ 4,288,000	$ 4,509,000
Net operating losses	0	3,091,000
Capitalized research and development	4,561,000	3,213,000
Deferred compensation	2,631,000	2,381,000
Accounts receivable	2,968,000	2,903,000
Employee benefits	2,842,000	2,877,000
Accrued pension	9,530,000	4,309,000
Research and development credit	1,696,000	4,581,000
Foreign tax credit	0	2,079,000
Other	5,746,000	8,558,000
Valuation allowance	0	(226,000)
Deferred tax asset	34,262,000	38,275,000
Components of Deferred Tax Liabilities [Abstract]
Goodwill and intangible assets	101,514,000	108,230,000
Depreciation	9,500,000	7,446,000
State taxes	2,975,000	3,443,000
Contingent interest	386,000	14,717,000
Deferred tax liabilities	114,375,000	133,836,000
Net liabilitiy	(80,113,000)	(95,561,000)
Investments in Foreign Subsidiaries and Foreign Corporate Joint Ventures that are Essentially Permanent in Duration [Member]
Deferred Tax Liability Not Recognized [Line Items]
Cumulative amount of temporary difference	$ 38,500,000