Goodwill and Other Intangibles Net - Summary of Changes in Intangible Assets (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
Finite and Indefinite Lived Intangible Assets [Line Items]
Indefinite-lived assets, carrying amount	$ 73,790	$ 57,247
Definite-lived assets, gross carrying amount	12,455	9,455
Intangible assets, gross carrying amount	86,245	66,702
Definite-lived assets, accumulated amortization	(6,560)	(4,518)
Intangible assets, accumulated amortization ending balance	(6,560)	(4,518)
Definite-lived assets, net carrying amount	5,895	4,937
Intangible assets, net carrying amount	79,685	62,184
Minimum [Member]
Finite and Indefinite Lived Intangible Assets [Line Items]
Estimated useful life	2 years
Maximum [Member]
Finite and Indefinite Lived Intangible Assets [Line Items]
Estimated useful life	5 years
Trade Names [Member]
Finite and Indefinite Lived Intangible Assets [Line Items]
Indefinite-lived assets, carrying amount	54,732	46,707
Definite-lived assets, gross carrying amount	8,210	5,625
Definite-lived assets, accumulated amortization	(2,797)	(1,055)
Definite-lived assets, net carrying amount	5,413	4,570
Noncompete Agreements [Member]
Finite and Indefinite Lived Intangible Assets [Line Items]
Definite-lived assets, gross carrying amount	4,225	3,830
Definite-lived assets, accumulated amortization	(3,763)	(3,463)
Definite-lived assets, net carrying amount	462	367
Favorable Leases [Member]
Finite and Indefinite Lived Intangible Assets [Line Items]
Definite-lived assets, gross carrying amount	20
Definite-lived assets, net carrying amount	20
Licensing Agreements [Member]
Finite and Indefinite Lived Intangible Assets [Line Items]
Indefinite-lived assets, carrying amount	$ 19,058	$ 10,540