Stock-Based Awards and Other Equity Instruments - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock reserved for new stock-based awards, shares	15,000,000
Stock-based compensation	$ 242,417	$ 178,068	$ 85,011
Market value of shares vested in period	57,000	60,000	12,000
Stock-based compensation tax benefit	56,000	45,000	20,000
Cash received from stock-based award exercises	128,000	89,000
Income tax benefit associated with employees exercise of stock-based awards	76,000	$ 130,000	$ 69,000
Unrecognized stock-based compensation expense	$ 385,000
Unrecognized stock-based compensation expense expected recognition period	2 years 8 months 12 days
Employee Stock Purchase Plan 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock purchase price as percentage of fair market value	85.00%
Eligible employees contribution of base compensation	10.00%
Employee stock purchase plan, shares purchased	139,000	95,000	102,000
Employee stock ownership plan, average purchase price of shares purchased	$ 95.63	$ 93.30	$ 68.70
Shares of our common stock reserved for issuance	1,100,000
Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock price, as of year end (in dollars per share)	$ 113.28
Total intrinsic value of stock options exercised, value	$ 181,000	$ 314,000	$ 208,000
Stock options granted during the period	5,670,000	7,572,000	4,113,000
Vesting period	4 years
Weighted average exercise price of shares issued (in dollars per share)	$ 47.57	$ 34.57	$ 25.66
Stock Options | Chief Executive Officer
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock options granted during the period		2,700,000
Employment agreement		5 years
Stock Options | Chairman And Senior Executive
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares issued upon exercise of options		1,900,000
Shares withheld to cover exercise price		500,000
Weighted average exercise price of shares issued (in dollars per share)		$ 30.38
Shares withheld to pay for tax obligations		800,000
Shares issued net of forfeitures		600,000
Performance Shares | Chief Executive Officer
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock options granted during the period		1,100,000
RSUs | Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period	3 years
RSUs | Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period	4 years
trivago
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Incremental stock based expense due to call of options previously exercised	$ 49,000