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) (USD $)
6 Months Ended
Jun. 30, 2014
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]  
Nonvested, beginning of period 43,840
Granted 18,815
Vested (19,445)
Nonvested, end of period 43,210
Weighted Average Grant Date Value, Beginning of period $ 15.96
Weighted Average Grant Date Fair Value, Granted $ 18.60
Weighted Average Grant Date Fair Value, Vested $ 18.00
Weighted Average Grant Date Value, End of period $ 16.20
Restricted Stock Units (RSUs)
 
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]  
Nonvested, beginning of period 1,331,753
Granted 1,178,326
Vested (4,662)
Forfeited (36,099)
Nonvested, end of period 2,469,318
Weighted Average Grant Date Value, Beginning of period $ 14.96
Weighted Average Grant Date Fair Value, Granted $ 16.86
Weighted Average Grant Date Fair Value, Vested $ 16.26
Weighted Average Grant Date Fair Value, Forfeited $ 15.54
Weighted Average Grant Date Value, End of period $ 15.85