Goodwill And Intangible Assets (Summary Of Intangible Assets) (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Acquired Finite-Lived Intangible Assets [Line Items]
Weighted Average Amortization Period of Finite Lived Assets (in years)	14 years 4 months 24 days
Gross Asset	$ 593,242	$ 591,952
Accumulated Amortization	194,905	183,029
Net	398,337	408,923
Finite-Lived Intangible Assets, Net	398,337	408,923	125,913
Intellectual Property Rights
Acquired Finite-Lived Intangible Assets [Line Items]
Weighted Average Amortization Period of Finite Lived Assets (in years)	16 years 6 months
Gross Asset	94,858	95,052
Accumulated Amortization	49,598	48,960
Net	45,260	46,092
Customer Relationships
Acquired Finite-Lived Intangible Assets [Line Items]
Weighted Average Amortization Period of Finite Lived Assets (in years)	13 years 10 months 24 days
Gross Asset	422,404	420,951
Accumulated Amortization	96,473	86,556
Net	325,931	334,395
Drawings
Acquired Finite-Lived Intangible Assets [Line Items]
Weighted Average Amortization Period of Finite Lived Assets (in years)	37 years 10 months 24 days
Gross Asset	11,149	11,149
Accumulated Amortization	9,976	9,951
Net	1,173	1,198
Other Intangible Assets
Acquired Finite-Lived Intangible Assets [Line Items]
Weighted Average Amortization Period of Finite Lived Assets (in years)	12 years 8 months 12 days
Gross Asset	64,831	64,800
Accumulated Amortization	38,858	37,562
Net	$ 25,973	$ 27,238