Quarterly report pursuant to Section 13 or 15(d)

Earnings Per Share - Schedule of Calculation of Basic and Diluted Earnings Per Common Share (Details)

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Earnings Per Share - Schedule of Calculation of Basic and Diluted Earnings Per Common Share (Details) (USD $)
In Thousands, except Per Share data, unless otherwise specified
3 Months Ended 6 Months Ended
Jun. 30, 2014
Jun. 30, 2013
Jun. 30, 2014
Jun. 30, 2013
Earnings Per Share Basic and Diluted        
Net income $ 9,837 $ 22,396 $ 21,026 $ 49,014
Less portion allocated to nonvested shares 100 275 219 556
Net income allocated to common shares $ 9,737 $ 22,121 $ 20,807 $ 48,458
Weighted average common shares outstanding 75,605 75,223 75,581 75,215
Basic and diluted earnings per common share $ 0.13 $ 0.29 $ 0.28 $ 0.64
Shares excluded due to being anti-dilutive (weighted-average)   859   864