Commitments and Contingencies - Additional Information (Detail) (USD $) In Thousands, except Share data, unless otherwise specified	0 Months Ended			0 Months Ended				3 Months Ended	12 Months Ended	3 Months Ended
	Jul. 15, 2009	Mar. 31, 2014	Dec. 31, 2013	Jul. 15, 2009 Initial Shares [Member]	Jul. 15, 2009 Earnout Shares [Member]	Mar. 31, 2014 Initial Shares and Earnout Shares [Member]	Dec. 31, 2013 Initial Shares and Earnout Shares [Member]	Mar. 31, 2013 Class A Common Stock [Member]	Dec. 31, 2012 Class A Common Stock [Member]	Mar. 31, 2014 Class A Common Stock [Member] Maximum [Member]
Contingencies And Commitments [Line Items]
Guarantees indemnifications		$ 5,908
Collateral/counter-guarantees		5,255
Aggregate fair value of consideration recognized by the company at acquisition date	61,624
Additional shares issued and subject to earnout criteria and payable over time				1,142,857	1,142,857
Initial and Earnout shares earned						1,371,992	1,371,992
Earnout shares became settled		0	1,029,006
Common stock issuable on non-contingent basis									170,988
Common stock issued on non-contingent basis								170,988
Common stock issuable on contingent basis										202,650
Underwriting commitments		$ 0