Income (Loss) in Equity Interests, Net (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Schedule of Equity Method Investments [Line Items]
Income (loss) in equity interests, net	$ (78)	$ 75	$ 58	$ (133)	$ (86)	$ (119)	$ (245)	$ (458)	$ (78)	$ (908)	$ (1,081)
Finland
Schedule of Equity Method Investments [Line Items]
Income (loss) in equity interests, net										343	573
Australia
Schedule of Equity Method Investments [Line Items]
Income (loss) in equity interests, net									(674)	(1,251)	(1,654)
Alma Career Oy | Eastern Europe and the Baltics
Schedule of Equity Method Investments [Line Items]
Income (loss) in equity interests, net									$ 596