Goodwill and Identifiable Intangible Assets - Summary of Acquired Intangible Assets (Detail) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Finite-Lived Intangible Assets [Line Items]
Accumulated Amortization, finite-lived intangibles	$ (8,028)	$ (4,646)
Other intangibles—indefinite lived	1,962	1,962
Gross Carrying Amount, Total intangible assets	27,539	26,210
Net Carrying Amount, Total intangible assets	19,511	21,564
Customer relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount, finite-lived intangibles	5,816	5,437
Accumulated Amortization, finite-lived intangibles	(1,114)	(743)
Net Carrying Amount, finite-lived intangibles	4,702	4,694
Developed technologies [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount, finite-lived intangibles	8,260	8,353
Accumulated Amortization, finite-lived intangibles	(3,412)	(2,194)
Net Carrying Amount, finite-lived intangibles	4,848	6,159
Trade name and other [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount, finite-lived intangibles	11,501	10,458
Accumulated Amortization, finite-lived intangibles	(3,502)	(1,709)
Net Carrying Amount, finite-lived intangibles	$ 7,999	$ 8,749