Stockholders' Equity and Stock Based Compensation (Details 5) - MSU's - 2013 Equity Incentive Plan shares in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2015 tranche	Dec. 31, 2015 $ / shares shares
Additional information
Number of separate tranches | tranche	3
Executive Officers
Dec 31, 2013 Assumptions used for estimation of fair value for ESPP
Expected term		3 years
Risk-free interest rate (as a percent)		0.99%
Expected volatility (as a percent)		39.00%
Expected dividend rate (as a percent)		0.00%
Number of shares underlying MSU's
Granted to employees (in shares) | shares		240
Cancelled/Forfeited (in shares) | shares		(47)
Balance at the end of the period (in shares) | shares		193
Weighted Average Grant Date Fair Value
Granted (in dollars per share)		$ 37.53
Cancelled/Forfeited (in dollars per share)		37.53
Balance at the end of the period (in dollars per share)		37.53
Executive Officers | Tranche one
Additional information
Percent of shares in tranche that can be received	100.00%
Grant date fair value per share		9.10
Executive Officers | Tranche two
Additional information
Grant date fair value per share		8.68
Executive Officers | Tranche three
Additional information
Percent of shares in tranche that can be received	150.00%
Grant date fair value per share		$ 19.75
Executive Officers | Minimum
Additional information
Vesting period for each tranche (in years)	one
Executive Officers | Maximum
Additional information
Vesting period for each tranche (in years)	three
Executive Officers | Maximum | Tranche two
Additional information
Percent of shares in tranche that can be received	100.00%