Goodwill and Intangible Assets (Detail) - Carrying Amounts of Amortizable Intangible Assets - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015	Dec. 31, 2015
Finite-Lived Intangible Assets [Line Items]
Finite-lived Intangible Assets Acquired			$ 4,110
Finite-Lived Intangible Assets, Fully Amortized Intangibles			287
Finite-lived Intangible Assets [Roll Forward]
Gross carrying amount			118,003
Foreign currency translation impact			(6,029)
Gross carrying amount	$ 115,797		115,797
Accumulated amortization	(34,028)		(34,028)		$ (21,459)
Finite-lived intangible assets, net	81,769		81,769		96,544
Amortization of intangibles	6,221	$ 2,737	18,614	$ 6,983
Trade Name
Finite-Lived Intangible Assets [Line Items]
Finite-lived Intangible Assets Acquired			302
Finite-Lived Intangible Assets, Fully Amortized Intangibles			0
Finite-lived Intangible Assets [Roll Forward]
Gross carrying amount			4,144
Foreign currency translation impact			(49)
Gross carrying amount	4,397		4,397
Accumulated amortization	(1,466)		(1,466)		(681)
Finite-lived intangible assets, net	2,931		$ 2,931		3,463
Trade Name | Minimum
Finite-lived Intangible Assets [Roll Forward]
Finite-lived intangible assets useful life			4 years
Trade Name | Maximum
Finite-lived Intangible Assets [Roll Forward]
Finite-lived intangible assets useful life			2 years
Customer Relationships
Finite-Lived Intangible Assets [Line Items]
Finite-lived Intangible Assets Acquired			$ 2,769
Finite-Lived Intangible Assets, Fully Amortized Intangibles			0
Finite-lived Intangible Assets [Roll Forward]
Gross carrying amount			62,860
Foreign currency translation impact			(2,631)
Gross carrying amount	62,998		62,998
Accumulated amortization	(14,312)		(14,312)		(9,028)
Finite-lived intangible assets, net	48,686		$ 48,686		53,832
Customer Relationships | Minimum
Finite-lived Intangible Assets [Roll Forward]
Finite-lived intangible assets useful life			4 years
Customer Relationships | Maximum
Finite-lived Intangible Assets [Roll Forward]
Finite-lived intangible assets useful life			7 years
Content
Finite-Lived Intangible Assets [Line Items]
Finite-lived Intangible Assets Acquired			$ 1,039
Finite-Lived Intangible Assets, Fully Amortized Intangibles			162
Finite-lived Intangible Assets [Roll Forward]
Gross carrying amount			5,450
Foreign currency translation impact			(3,416)
Gross carrying amount	2,911		2,911
Accumulated amortization	(1,573)		(1,573)		(3,525)
Finite-lived intangible assets, net	1,338		$ 1,338		1,925
Content | Minimum
Finite-lived Intangible Assets [Roll Forward]
Finite-lived intangible assets useful life			1 year 6 months
Content | Maximum
Finite-lived Intangible Assets [Roll Forward]
Finite-lived intangible assets useful life			4 years
Software
Finite-Lived Intangible Assets [Line Items]
Finite-lived Intangible Assets Acquired			$ 0
Finite-Lived Intangible Assets, Fully Amortized Intangibles			125
Finite-lived Intangible Assets [Roll Forward]
Gross carrying amount			16,219
Foreign currency translation impact			45
Gross carrying amount	16,139		16,139
Accumulated amortization	(7,617)		(7,617)		(3,699)
Finite-lived intangible assets, net	8,522		$ 8,522		12,520
Finite-lived intangible assets useful life			3 years
Non-Compete
Finite-Lived Intangible Assets [Line Items]
Finite-lived Intangible Assets Acquired			$ 0
Finite-Lived Intangible Assets, Fully Amortized Intangibles			0
Finite-lived Intangible Assets [Roll Forward]
Gross carrying amount			29,330
Foreign currency translation impact			22
Gross carrying amount	29,352		29,352
Accumulated amortization	(9,060)		(9,060)		(4,526)
Finite-lived intangible assets, net	$ 20,292		$ 20,292		$ 24,804
Non-Compete | Minimum
Finite-lived Intangible Assets [Roll Forward]
Finite-lived intangible assets useful life			3 years
Non-Compete | Maximum
Finite-lived Intangible Assets [Roll Forward]
Finite-lived intangible assets useful life			5 years