Amortizable Intangible Assets - Additional Information (Detail) (USD $)	Jun. 30, 2013
Goodwill And Intangible Assets Disclosure [Abstract]
Amortization expense estimated, year one (2013)	$ 64,271,000
Amortization expense estimated, year two (2014)	63,327,000
Amortization expense estimated, year three (2015)	62,038,000
Amortization expense estimated, year four (2016)	57,457,000
Amortization expense estimated, year five (2017)	$ 54,745,000