Lease Exit and Related Charges (Changes to Accrued Loss on Excess Office Facilities) (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Jun. 30, 2014	Dec. 31, 2013
Disclosure Changes To Accrued Loss On Excess Office Facilities [Abstract]
Accrued loss as of December 31, 2013		$ 254
Additions and adjustments to the lease exit charges accrual, including sublease income estimate revision	400
Less amounts paid, net of sublease amounts	(124)
Accrued loss as of June 30, 2014 (included in Accrued and other current liabilities)	$ 530	$ 254