Intangible Assets Acquired Either Individually or with Group of Other Assets or in Business Combination (Detail) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Acquired Finite Lived Intangible Assets [Line Items]
Gross carrying amount	$ 386,130	$ 391,513
Accumulated amortization	314,081	292,911
Net	72,049	98,601
Customer-Related Intangible Assets
Acquired Finite Lived Intangible Assets [Line Items]
Gross carrying amount	310,277	319,035
Accumulated amortization	259,460	247,463
Net	50,817	71,572
Marketing-Related Intangible Assets
Acquired Finite Lived Intangible Assets [Line Items]
Gross carrying amount	42,587	42,749
Accumulated amortization	29,277	27,021
Net	13,310	15,728
Other Intangible Assets
Acquired Finite Lived Intangible Assets [Line Items]
Gross carrying amount	33,266	29,729
Accumulated amortization	25,344	18,427
Net	$ 7,922	$ 11,301