Incentive Plans (Details) - Stock Option [Member] $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2015 USD ($) $ / shares shares
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Outstanding-Beginning of year | shares	602
Exercised | shares	(4)
Forfeited | shares	(105)
Outstanding-End of year | shares	493
Exercisable-End of year | shares	416
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Roll Forward]
Outstanding-Beginning of year | $ / shares	$ 15.5
Exercised | $ / shares	2.67
Forfeited | $ / shares	15.55
Outstanding-End of year | $ / shares	15.6
Exercisable-End of year | $ / shares	$ 15.87
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Aggregate Intrinsic Value [Roll Forward]
Outstanding-Beginning of year | $	$ 243
Outstanding-End of year | $	$ 0
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Life [Roll Forward]
Outstanding-Beginning of year	4 years 2 months 1 day
Outstanding-End of year	3 years 3 months 4 days
Exercisable - End of year	2 years 9 months 4 days