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Stock and Incentive Compensation Plans - Summary of Stock Plan Activity (Details) - Stock and Incentive Compensation Plan [Member] - shares
3 Months Ended 9 Months Ended
Sep. 30, 2016
Sep. 30, 2016
Performance Based Award [Member]    
Shares [Roll Forward]    
Nonvested shares, beginning of period (in shares) 239,006 212,309
Granted (in shares)   99,116
Released from restriction (in shares) (1,587) (40,888)
Forfeited (in shares) (283) (33,401)
Nonvested shares, end of period (in shares) 237,136 237,136
Time-Vested Awards [Member]    
Shares [Roll Forward]    
Nonvested shares, beginning of period (in shares) 327,197 306,657
Granted (in shares) 2,000 139,291
Released from restriction (in shares) (3,379) (105,717)
Forfeited (in shares) (917) (15,330)
Nonvested shares, end of period (in shares) 324,901 324,901