Amortizable Intangible Assets - Additional Information (Detail) (USD $)	Mar. 31, 2014
Goodwill And Intangible Assets Disclosure [Abstract]
Amortization expense estimated, year one (2014)	$ 71,330,000
Amortization expense estimated, year two (2015)	70,047,000
Amortization expense estimated, year three (2016)	65,516,000
Amortization expense estimated, year four (2017)	62,807,000
Amortization expense estimated, year five (2018)	$ 57,482,000