Fair Value Measurements - Change in Redeemable Noncontrolling Interests (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013
Fair Value Disclosures [Abstract]
Balance at beginning of period
Initial redeemable noncontrolling interest related to business combinations	25,517
Net loss attributable to redeemable noncontrolling interests	(1,167)
Adjustment of the redeemable noncontrolling interests to fair value	1,167
Effect of foreign currency translation attributable to redeemable noncontrolling interests	1,047
Balance at end of period	$ 26,564