Goodwill and Intangible Assets - Additional Information (Detail) - USD ($)	3 Months Ended								12 Months Ended
	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Goodwill [Line Items]
Adjustment to goodwill, revision of initial purchase price allocation										$ 900,000
Decrease in intangible assets, purchase price adjustment										200,000
Increase in financial liabilities, purchase price adjustment										700,000
Goodwill impairment loss									$ 0
Amortization of intangibles assets	$ 3,801,000	$ 3,728,000	$ 3,706,000	$ 4,016,000	$ 3,569,000	$ 2,369,000	$ 2,293,000	$ 2,301,000	15,251,000	$ 10,532,000	$ 8,470,000
FolioDynamix
Goodwill [Line Items]
Goodwill impairment loss									$ 39,656,000