Quarterly report pursuant to Section 13 or 15(d)

Stock-Based Compensation (Details 3)

v2.4.0.8
Stock-Based Compensation (Details 3) (USD $)
 3 Months Ended 9 Months Ended 12 Months Ended
Mar. 31, 2014
Sep. 30, 2014
Dec. 31, 2013
Additional disclosures      
Unrecognized stock-based compensation expense   $ 111,800,000  
Stock options
      
Stock options      
Outstanding at the beginning of the period (in shares) 70,339 70,339  
Outstanding at the end of the period (in shares)   70,339 70,339
Expected to vest (in shares)   70,339  
Weighted average exercise price      
Outstanding at the beginning of the period (in dollars per share) $ 54.15 $ 54.15  
Outstanding at the end of the period (in dollars per share)   $ 54.15 $ 54.15
Expected to vest (in dollars per share)   $ 54.15  
Weighted average remaining contractual life      
Outstanding at the beginning of the period   9 years 15 days 9 years 9 months 15 days
Outstanding at the end of the period   9 years 15 days 9 years 9 months 15 days
Expected to vest   9 years 15 days  
Intrinsic Value      
Outstanding at the beginning of the period 653,000 653,000  
Outstanding at the end of the period   52,000 653,000
Expected to vest   52,000  
Weighted-average assumptions used to calculate fair value of stock options granted      
Dividend yield (as a percent) 0.00%    
Volatility (as a percent)   35.00%  
Risk-free interest rate (as a percent)   1.48%  
Expected life   6 years 2 months 1 day  
Weighted average fair value of options granted (in dollars per share)   $ 20.20  
Additional disclosures      
Unrecognized stock-based compensation expense   $ 900,000  
Weighted average period for recognizing unrecognized stock-based compensation expense   3 years  
Stock options | Minimum
      
Stock-based compensation      
Vesting period   1 year  
Stock options | Maximum
      
Stock-based compensation      
Vesting period   4 years  
Contractual life   10 years