Goodwill And Intangible Assets - Additional Information (Detail) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Oct. 01, 2014
Schedule of Intangible Assets Disclosure [Line Items]
Amortization expenses	$ 6,567,000	$ 2,693,000	$ 1,618,000
Trade Names | Minimum
Schedule of Intangible Assets Disclosure [Line Items]
Finite lived intangible assets, useful life	10 years
Trade Names | Maximum
Schedule of Intangible Assets Disclosure [Line Items]
Finite lived intangible assets, useful life	15 years
Discounted Cash Flows Approach
Schedule of Intangible Assets Disclosure [Line Items]
Decrease in carrying value of trade name	$ 3,400,000
Discounted Cash Flows Approach | Fair Value, Inputs, Level 3 | Trade Names | Minimum
Schedule of Intangible Assets Disclosure [Line Items]
Indefinite-lived intangible assets impairment, discount rate				14.00%
Indefinite-lived intangible assets impairment, growth rate				2.50%
Discounted Cash Flows Approach | Fair Value, Inputs, Level 3 | Trade Names | Maximum
Schedule of Intangible Assets Disclosure [Line Items]
Indefinite-lived intangible assets impairment, discount rate				15.50%
Indefinite-lived intangible assets impairment, growth rate				3.00%