Goodwill and Other Intangible - Additional Information (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Schedule Of Goodwill And Other Intangible Asset [Line Items]
Amortization of acquired intangible assets	$ 488	$ 231	$ 104
Amortization expenses of intangible assets, 2016	525
Amortization expenses of intangible assets, 2017	518
Amortization expenses of intangible assets, 2018	495
Amortization expenses of intangible assets, 2019	495
Amortization expenses of intangible assets, 2020	274
Amortization expenses of intangible assets, After 2020	$ 287
Weighted average useful life of intangible assets	4 years 10 months 24 days	7 years 7 months 6 days
Weighted Average [Member]
Schedule Of Goodwill And Other Intangible Asset [Line Items]
Weighted average useful life of intangible assets	4 years 10 months 24 days
Lease Related Intangibles [Member]
Schedule Of Goodwill And Other Intangible Asset [Line Items]
Impairment of Intangible Assets, Finite-lived	$ 120
Weighted average useful life of intangible assets	4 years 2 months 12 days	6 years 9 months 18 days