Stock and Incentive Compensation Plans - Summary of Stock Plan Activity (Details) - Stock and Incentive Compensation Plan [Member] - shares	3 Months Ended	6 Months Ended
	Jun. 30, 2017	Jun. 30, 2017
Performance Based Award [Member]
Shares [Roll Forward]
Nonvested shares, beginning of period (in shares)	229,994	237,136
Granted (in shares)		58,406
Released from restriction (in shares)	(3,606)	(66,207)
Forfeited (in shares)	(6,250)	(9,197)
Nonvested shares, end of period (in shares)	220,138	220,138
Time-Vested Awards [Member]
Shares [Roll Forward]
Nonvested shares, beginning of period (in shares)	325,684	322,056
Granted (in shares)	15,000	103,224
Released from restriction (in shares)	(10,790)	(94,652)
Forfeited (in shares)	(430)	(1,164)
Nonvested shares, end of period (in shares)	329,464	329,464