Restructuring Program - Schedule of Restructuring Program Activity (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2015
Restructuring Cost and Reserve [Line Items]
Restructuring and other related costs	$ 145
Severance and Other Employment Expenses [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and other related costs, Liability, Beginning balance	7,691
Restructuring and other related costs	145
Restructuring and other related costs, Payments made	(7,409)
Restructuring and other related costs, Liability, Ending balance	$ 427