Quarterly report pursuant to Section 13 or 15(d)

Stock-based Compensation (Details)

v3.4.0.3
Stock-based Compensation (Details) - $ / shares
1 Months Ended 3 Months Ended
Mar. 31, 2015
Mar. 31, 2016
2010 Equity Incentive Plan | Restricted Stock    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Vesting period (in years)   3 years
2010 Equity Incentive Plan | Performance-Based Restricted Stock    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Vesting period (in years) 1 year  
Vesting condition 1 | Restricted Stock    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Granted shares of restricted stock   364,651
Number of consecutive trading days required to calculate average price per share (in days)   20 days
Minimum price per common stock for vesting eligibility (in dollars per share)   $ 27.28
Vesting condition 1 | 2010 Equity Incentive Plan | Restricted Stock    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Granted shares of restricted stock   1,259,072
Vesting condition 2 | Restricted Stock    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Granted shares of restricted stock   364,649
Number of consecutive trading days required to calculate average price per share (in days)   20 days
Minimum price per common stock for vesting eligibility (in dollars per share)   $ 32.15