Noncontrolling Interest Subject to Put Provisions - Schedule of Noncontrolling Interest Subject to Put Provisions (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Stockholders' Equity Attributable to Noncontrolling Interest [Roll Forward]
Beginning Balance			$ 784	$ 0
Acquisitions during the period				1,205
Net loss	(41)	(41)	(77)	(87)
Other comprehensive income			41	(103)
Ending Balance	$ 748	$ 1,015	$ 748	$ 1,015