v3.3.1.900
Share Compensation and Pension Plans - Restricted Stock Activity (Details) - $ / shares
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
CEO Non-Performance-Based Restricted Share Units      
Number of Restricted Units      
Beginning Balance, Non-vested (in shares) 146,666.000 149,701.000 86,705
Awards granted (in shares) 64,795 70,298 149,701
Awards vested (in shares) (73,333) (73,333) (86,705)
Awards forfeited (in shares) 0 0 0
Ending Balance, Non-vested (in shares) 138,128.000 146,666.000 149,701.000
Weighted Average Grant-Date Fair Value      
Weighted average grant date fair value, beginning balance $ 10.45 $ 10.02 $ 8.56
Awards granted 13.89 11.38 10.02
Awards vested 10.45 10.45 8.56
Awards forfeited 0.00 0.00 0.00
Weighted average grant date fair value, ending balance $ 12.07 $ 10.45 $ 10.02
Non-CEO Non-Performance-Based Restricted Share Units      
Number of Restricted Units      
Beginning Balance, Non-vested (in shares) 86,317.000 95,590.00 0
Awards granted (in shares) 38,180 38,522 95,590
Awards vested (in shares) (67,061) (47,795) 0
Awards forfeited (in shares) (4,284) 0 0
Ending Balance, Non-vested (in shares) 53,152.000 86,317.000 95,590.00
Weighted Average Grant-Date Fair Value      
Weighted average grant date fair value, beginning balance $ 10.63 $ 10.02 $ 0.00
Awards granted 13.94 11.38 10.02
Awards vested 10.41 10.02 0.00
Awards forfeited 11.38 0.00 0.00
Weighted average grant date fair value, ending balance $ 13.22 $ 10.63 $ 10.02
Performance-Based Restricted Share Units      
Number of Restricted Units      
Beginning Balance, Non-vested (in shares) 807,770.00 753,862.000 860,506
Awards granted (in shares) 291,730 396,672 359,652
Awards vested (in shares) (188,681) (100,308) 0
Awards forfeited (in shares) (165,337) (242,456) (466,296)
Ending Balance, Non-vested (in shares) 745,482.000 807,770.00 753,862.000
Weighted Average Grant-Date Fair Value      
Weighted average grant date fair value, beginning balance $ 10.51 $ 9.21 $ 8.34
Awards granted 13.89 11.38 10.02
Awards vested 9.54 8.56 0.00
Awards forfeited 10.61 8.56 8.31
Weighted average grant date fair value, ending balance $ 12.05 $ 10.51 $ 9.21