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, 2017	Sep. 30, 2017
Performance Based Award [Member]
Shares [Roll Forward]
Nonvested shares, beginning of period (in shares)	220,138	237,136
Granted (in shares)		58,406
Released from restriction (in shares)	(1,072)	(67,279)
Forfeited (in shares)	(1,803)	(11,000)
Nonvested shares, end of period (in shares)	217,263	217,263
Time-Vested Awards [Member]
Shares [Roll Forward]
Nonvested shares, beginning of period (in shares)	329,464	322,056
Granted (in shares)	1,000	104,224
Released from restriction (in shares)	(754)	(95,406)
Forfeited (in shares)	(1,592)	(2,756)
Nonvested shares, end of period (in shares)	328,118	328,118