Fair Value Measurements - Changes in Level Three Financial Assets and Liabilities Measured on Recurring Basis (Detail) (Level 3 [Member], USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Deposits and Other Assets [Member] | Warrants [Member]
Changes In Level 3 Assets And Liabilities Measured At Fair Value On Recurring Basis [Line Items]
Beginning Balance	$ 29	$ 12
Purchases and issuances			40
Revaluations included in earnings	182	17	(28)
Ending Balance	211	29	12
Accrued Expenses [Member] | Contingent Consideration [Member]
Changes In Level 3 Assets And Liabilities Measured At Fair Value On Recurring Basis [Line Items]
Beginning Balance	3,521	6,165
Initial estimate of contingent consideration	14,300	1,990	6,165
Revaluations included in earnings	(4,807)	(4,634)
Ending Balance	$ 13,014	$ 3,521	$ 6,165