Goodwill and Other Intangibles - Summary of Goodwill and Other Intangible Assets Acquired (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Acquired Finite-Lived Intangible Assets [Line Items]
Goodwill	$ 74,377	$ 44,577
Gross carrying value of intangible assets subject to amortization	2,125	2,125
Less accumulated amortization	(1,168)	(1,064)
Net carrying value	957	1,061
Lease Related Intangibles [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Gross carrying value of intangible assets subject to amortization	1,345	1,345
Non-Compete Agreements [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Gross carrying value of intangible assets subject to amortization	30	30
Trade Names [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Gross carrying value of intangible assets subject to amortization	$ 750	$ 750