Total Debt (Detail) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2014		Dec. 31, 2013
Debt Instrument [Line Items]
Other short-term borrowing			$ 1,200
Total debt	679,102		735,880
Term A due on April 17, 2018 [Member] | Senior Secured Credit Facility [Member]
Debt Instrument [Line Items]
Credit facility	280,968	[1],[2]	292,153	[1],[2]
Term B due on April 17, 2020 [Member] | Senior Secured Credit Facility [Member]
Debt Instrument [Line Items]
Credit facility	390,134	[2],[3]	392,527	[2],[3]
Expiring on April 17, 2018 [Member] | Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Credit facility	$ 8,000		$ 50,000

[1] Applicable margin of 2.50% at September 30, 2014 and December 31, 2013.

[2] Includes unamortized discount.

[3] Subject to a minimum rate ("LIBOR floor") of 0.75% plus applicable margin of 2.75% at September 30, 2014 and December 31, 2013.