Restructuring and Severance (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended	6 Months Ended	12 Months Ended
	Jun. 30, 2014	Jun. 30, 2014	Dec. 31, 2013
Restructuring Cost And Reserve [Line Items]
Restructuring and Severance Beginning Balance		$ 1,149
Employee Severance Expense Recorded During Period	612	1,049	1,770
Payments to Employees		(1,131)	(621)
Restructuring and Severance Ending Balance	$ 1,067	$ 1,067	$ 1,149