Business Restructuring - Reconciliation of Restructuring Liability (Detail) - USD ($) $ in Thousands	3 Months Ended			12 Months Ended
	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Dec. 31, 2014
2014 Restructuring [Member]
Restructuring Cost And Reserve [Line Items]
Restructuring charges			$ 1,722
2014 Restructuring [Member] | Severance Expense [Member]
Restructuring Cost And Reserve [Line Items]
Restructuring liability at Beginning Balance	$ 264	$ 1,722
Amounts paid	(260)	(1,435)
Foreign currency translation	5	(23)
Expense adjustment	(9)
Restructuring liability at Ending Balance		264	1,722	$ 1,722
2013 Restructuring [Member] | Severance Expense [Member]
Restructuring Cost And Reserve [Line Items]
Restructuring liability at Beginning Balance	186	563		1,040
Amounts paid	(96)	(338)		(420)
Foreign currency translation	4	(39)		(57)
Restructuring liability at Ending Balance	$ 94	$ 186	$ 563	$ 563