Lease Exit and Related Charges (Changes to Accrued Loss on Excess Office Facilities) (Detail) $ in Thousands	6 Months Ended
	Jun. 30, 2015 USD ($)
Accrued Loss on Excess Office Facilities [Roll Forward]
Accrued loss at December 31, 2014	$ 234
Additions and adjustments to the lease loss accrual, including sublease income	83
Less amounts paid, net of sublease amounts	(102)
Accrued loss at June 30, 2015	$ 215