Goodwill and Intangible Assets - Summary of Goodwill and Intangible Assets Acquired (Detail) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	$ 4,642	$ 4,392
Accumulated Amortization	(2,191)	(1,796)
Net Carrying Value	2,451	2,596
Lease Related Intangibles [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	3,612	3,612
Accumulated Amortization	(1,584)	(1,206)
Net Carrying Value	2,028	2,406
Non-Compete Agreements [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	30	30
Accumulated Amortization	(25)	(21)
Net Carrying Value	5	9
Trade Names [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	750	750
Accumulated Amortization	(582)	(569)
Net Carrying Value	168	$ 181
Licenses [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	250
Accumulated Amortization	0
Net Carrying Value	$ 250