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Benefit Plans - Valuation Assumptions, Stock Option Activity and RSU Activity (Details) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
3 Months Ended 6 Months Ended 12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2016
Dec. 31, 2015
Jun. 30, 2016
Unrecognized Compensation Costs Not yet Recognized          
Total unrecognized compensation cost, net of estimated forfeitures, related to unvested stock options $ 1,552   $ 1,552    
Stock options          
Vesting period          
Expiration period     10 years    
Valuation assumptions:          
Expected dividend yield (as a percent)       0.00%  
Expected volatility (as a percent)       34.00%  
Expected term (years)       6 years 3 months  
Risk-free interest rate (as a percent)       1.83%  
Options Outstanding, Number of Shares          
Balance at the beginning of the period     3,464    
Options granted 0 0 0    
Options forfeited     (11)    
Options exercised     (191)    
Balance at the end of the period 3,262   3,262   3,464
Options Outstanding, Weighted average exercise price          
Balance at the beginning of the period (in dollars per share)     $ 11.75    
Options forfeited (in dollars per share)     17.00    
Options exercised (in dollars per share)     13.81    
Balance at the end of the period (in dollars per share) $ 11.61   $ 11.61   $ 11.75
Options Additional Disclosures          
Weighted average remaining contractual term     6 years 2 months 1 day   6 years 8 months 12 days
Aggregate intrinsic value, at the beginning of the period     $ 108,944    
Weighted average remaining contractual term of options exercisable at the end of the period (years)     5 years 8 months 12 days    
Aggregate intrinsic value,at the end of the period $ 60,783   $ 60,783   $ 108,944
Options exercisable at the end of the period (in shares) 2,354   2,354    
Options exercisable at the end of the period, weighted average exercise price (in dollars per share) $ 8.57   $ 8.57    
Options exercisable intrinsic value $ 50,648   $ 50,648    
Total intrinsic value of options exercised $ 1,648 $ 4,653 $ 5,539 $ 7,588  
Options vested and expected to vest          
Number of shares 3,235   3,235    
Weighted average exercise price $ 11.50   $ 11.50    
Weighted average remaining contractual term     6 years 1 month 28 days    
Aggregate intrinsic value $ 60,578   $ 60,578    
Weighted average grant date fair value          
Weighted average grant date fair value of options granted (in dollars per share)       $ 12.92  
Unrecognized Compensation Costs Not yet Recognized          
Weighted average period to recognize unrecognized compensation cost     1 year 3 months 29 days    
Stock options | Minimum          
Vesting period          
Vesting period     3 years    
Stock options | Maximum          
Vesting period          
Vesting period     4 years    
Restricted stock units          
Unrecognized Compensation Costs Not yet Recognized          
Total unrecognized compensation cost, net of estimated forfeitures $ 33,624   $ 33,624    
Weighted average period to recognize unrecognized compensation cost     2 years 11 days    
RSUs Outstanding Rollforward, Units          
RSU Balance at the beginning of the period (in shares)     1,003    
RSUs granted (in shares)     746    
RSUs vested (in shares)     (222)    
RSUs forfeited (in shares)     (26)    
RSU Balance at the end of the period (in shares) 1,501   1,501   1,003
RSUs expected to vest at the end of the period (in shares) 1,318   1,318    
RSUs Outstanding, Weighted average grant date fair value          
RSU Balance at the beginning of the period (in dollars per share)     $ 32.74    
RSUs granted (in dollars per share)     45.45    
RSUs vested (in dollars per share)     31.86    
RSUs cancelled/forfeited (in dollars per share)     38.48    
RSU Balance at the end of the period (in dollars per share) $ 39.06   39.06   $ 32.74
RSUs expected to vest at the end of the period (in dollars per share) $ 38.88   $ 38.88    
Restricted stock units | Minimum          
Vesting period          
Vesting period     3 years    
Restricted stock units | Maximum          
Vesting period          
Vesting period     4 years