Acquisitions - Additional Information - Sabre Asset Purchase (Detail) (USD $) In Thousands, unless otherwise specified			3 Months Ended	9 Months Ended
	Sep. 30, 2014	Dec. 31, 2013	Mar. 31, 2014 Sabre [Member]	Sep. 30, 2014 Sabre [Member]	Sep. 30, 2014 Legal Fees [Member] Sabre [Member]	Sep. 30, 2014 Accounting Services Fees [Member] Sabre [Member]	Sep. 30, 2014 Consulting Fees [Member] Sabre [Member]
Business Acquisition [Line Items]
Fair value of purchase consideration				$ 14,000
Fair value of stock consideration				1,000
Decrease in receivable due from seller			234
Decrease in accrued expenses			86
Increase in goodwill			148
Goodwill	22,213	22,489		4,725
Acquisition transaction costs					$ 93	$ 68	$ 37