Goodwill and Intangible Assets - Summary of Goodwill and Intangible Assets Acquired (Detail) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	$ 4,392	$ 4,392
Accumulated Amortization	(1,927)	(1,796)
Net Carrying Value	2,465	2,596
Lease Related Intangibles [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	3,612	3,612
Accumulated Amortization	(1,332)	(1,206)
Net Carrying Value	2,280	2,406
Non-Compete Agreements [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	30	30
Accumulated Amortization	(22)	(21)
Net Carrying Value	8	9
Trade Names [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	750	750
Accumulated Amortization	(573)	(569)
Net Carrying Value	$ 177	$ 181