Quarterly report pursuant to Section 13 or 15(d)

Share-Based Compensation and Cash-Based Incentive Compensation - Summary of Share Activity Related to Restricted Stock Units (Details)

v2.4.0.8
Share-Based Compensation and Cash-Based Incentive Compensation - Summary of Share Activity Related to Restricted Stock Units (Details) (Restricted Stock Units (RSUs), USD $)
9 Months Ended
Sep. 30, 2014
Restricted Stock Units (RSUs)
 
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]  
Nonvested, beginning of period 1,331,753
Granted 1,190,920
Vested (4,662)
Forfeited (36,422)
Nonvested, end of period 2,481,589
Weighted Average Grant Date Value, Beginning of period $ 14.96
Weighted Average Grant Date Fair Value, Granted $ 16.83
Weighted Average Grant Date Fair Value, Vested $ 16.26
Weighted Average Grant Date Fair Value, Forfeited $ 15.57
Weighted Average Grant Date Value, End of period $ 15.85