Intangible Assets and Goodwill - Company's Intangible Assets and Goodwill (Detail) - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2017	Dec. 31, 2016
Finite Lived And Indefinite Lived Intangible Assets [Line Items]
Accumulated Amortization	$ (9,020)	$ (8,350)
Definite-lived intangible assets, Net Book Value	17,780
Total intangible assets, Gross Carrying Amount	36,733	36,733
Accumulated Amortization	(9,020)	(8,350)
Total intangible assets, Net Book Value	27,713	28,383
Goodwill	48,910	53,531
Total intangible assets and goodwill, Gross Carrying Amount	85,643	90,264
Accumulated Amortization	(9,020)	(8,350)
Total intangible assets and goodwill, Net Book Value	76,623	81,914
Trademarks
Finite Lived And Indefinite Lived Intangible Assets [Line Items]
Indefinite-lived intangible assets	$ 9,933	$ 9,933
Customer Relationships
Finite Lived And Indefinite Lived Intangible Assets [Line Items]
Estimated Useful Life (years)	20 years	20 years
Definite-lived intangible assets, Gross Carrying Amount	$ 26,800	$ 26,800
Accumulated Amortization	(9,020)	(8,350)
Definite-lived intangible assets, Net Book Value	17,780	18,450
Accumulated Amortization	(9,020)	(8,350)
Accumulated Amortization	$ (9,020)	$ (8,350)