Intangible Assets (Details) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Intangible Assets [Line Items]
Net carrying amount	$ 154,195,000	$ 175,823,000
Aggregate amortization expense	24,700,000	24,400,000	33,200,000
2014	21,450,000
2015	16,510,000
2016	12,025,000
2017	11,544,000
2018	9,391,000
Acquired identifiable intangibles
Intangible Assets [Line Items]
Gross carrying amount	222,140,000	250,010,000
Less accumulated amortization	(70,517,000)	(78,328,000)
Net carrying amount	151,623,000	171,682,000
Product technology | Acquired identifiable intangibles
Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	69,919,000	94,975,000
Weighted average estimated useful life	11 years
Customer relationships | Acquired identifiable intangibles
Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	83,899,000	84,681,000
Weighted average estimated useful life	11 years
Trademarks and tradename portfolios | Acquired identifiable intangibles
Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	7,160,000	7,160,000
Weighted average estimated useful life	15 years
Other | Acquired identifiable intangibles
Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	21,996,000	24,319,000
Weighted average estimated useful life	5 years
Patents | Nonacquired intangibles
Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	4,471,000	4,464,000
Less accumulated amortization	(3,989,000)	(3,960,000)
Net carrying amount	482,000	504,000
Weighted average estimated useful life	17 years
Acquired in-place leases and other | Nonacquired intangibles
Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	9,333,000	9,150,000
Less accumulated amortization	(7,243,000)	(5,513,000)
Net carrying amount	2,090,000	3,637,000
Weighted average estimated useful life	6 years
Tradename not subject to amortization [Member] | Acquired identifiable intangibles
Intangible Assets [Line Items]
Gross carrying amount	$ 39,166,000	$ 38,875,000