Accrual for Exit and Realignment Costs (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013
Restructuring Reserve [Roll Forward]
Accrued exit and realignment costs, beginning of period	$ 4,274	$ 3,510	$ 2,909	$ 1,509	$ 1,764	$ 6,214
Provision for exit and realignment activities	3,127	2,242	1,339	724		541
Change in estimate				(79)
Cash payments, net of sublease income	(1,327)	(1,478)	(738)	(568)	(255)	(4,991)
Accrued exit and realignment costs, end of period	6,074	4,274	3,510	1,586	1,509	1,764
Lease Obligations
Restructuring Reserve [Roll Forward]
Accrued exit and realignment costs, beginning of period	2,178	2,555	2,434	674	792	5,098
Provision for exit and realignment activities	912	6	532	648		538
Change in estimate				0
Cash payments, net of sublease income	(867)	(383)	(411)	(463)	(118)	(4,844)
Accrued exit and realignment costs, end of period	2,223	2,178	2,555	859	674	792
Severance
Restructuring Reserve [Roll Forward]
Accrued exit and realignment costs, beginning of period	2,096	955	475	835	972	1,116
Provision for exit and realignment activities	2,215	2,236	807	76		3
Change in estimate				(79)
Cash payments, net of sublease income	(460)	(1,095)	(327)	(105)	(137)	(147)
Accrued exit and realignment costs, end of period	$ 3,851	$ 2,096	$ 955	$ 727	$ 835	$ 972