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Equity-Based Compensation (Details 2) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		9 Months Ended			3 Months Ended		9 Months Ended	3 Months Ended		9 Months Ended		0 Months Ended	3 Months Ended		9 Months Ended			3 Months Ended		9 Months Ended		0 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014 Restricted Stock Units and Restricted Stock Awards 2012 Plan	Sep. 30, 2014 Restricted stock	Sep. 30, 2013 Restricted stock	Sep. 30, 2014 Restricted stock	Sep. 30, 2014 Restricted stock units	Sep. 30, 2013 Restricted stock units	Sep. 30, 2014 Restricted stock units	Sep. 30, 2013 Restricted stock units	Mar. 14, 2014 Restricted stock units Virtual Moment, LLC	Sep. 30, 2014 Restricted stock units Virtual Moment, LLC	Sep. 30, 2013 Restricted stock units Virtual Moment, LLC	Sep. 30, 2014 Restricted stock units Virtual Moment, LLC	Sep. 30, 2013 Restricted stock units Virtual Moment, LLC	Sep. 30, 2014 Restricted stock units 2012 Plan	Sep. 30, 2014 Employee stock purchase plan 2012 ESPP	Sep. 30, 2013 Employee stock purchase plan 2012 ESPP	Sep. 30, 2014 Employee stock purchase plan 2012 ESPP	Sep. 30, 2013 Employee stock purchase plan 2012 ESPP	Apr. 24, 2014 Chief Executive Officer Restricted stock units	Apr. 24, 2014 Chief Executive Officer Restricted stock units
Plan Options
Non-vested balance at the beginning of the period (in shares)											10,000
Units granted (in shares)											640,975												100,000
Units vested (in shares)											(3,125)
Units cancelled or forfeited (in shares)											(18,850)
Non-vested balance at the end of the period (in shares)									629,000		629,000
Weighted Average Fair Value
Non-vested balance at the beginning of the period (in dollars per share)											$ 47.17
Units granted (in dollars per share)											$ 83.19
Units vested (in dollars per share)											$ 47.17
Units cancelled or forfeited (in dollars per share)											$ 81.36
Non-vested balance at the end of the period (in dollars per share)									$ 82.85		$ 82.85
Non-cash stock-based compensation expense net of estimated forfeitures recognized in connection with one-time acceleration charge																			$ 225	$ 138	$ 598	$ 428
Recognized compensation charge	6,334	1,852	15,728	4,422		259	259	777	3,234	30	7,518	48		419	0	910	0
Vesting period of granted award													2 years					3 years			6 months
Consideration period for awards granted																							90 days
Closing price of the common stock equals or exceeds for 90 consecutive calendar days																							$ 161.88
Service period for amortization of awards																							6 years
Total fair value of the grant																								5,870
Reversal of charge upon the completion of service period																							0
Unrecognized compensation charge					$ 47,300
Number of shares issued under ESPP																			112,030

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The number of equity-based payment instruments, excluding stock (or unit) options, that were forfeited during the reporting period.

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Weighted average fair value as of the grant date of equity-based award plans other than stock (unit) option plans that were not exercised or put into effect as a result of the occurrence of a terminating event.

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