Stock Compensation Plans (Details) - SOSARs and Stock Options - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Options & SOSARs outstanding at beginning of period, shares	52
Options exercised, Shares	(52)
Options & SOSARs cancelled / forfeited, Shares	0
Options and SOSARs outstanding at end of period, shares	0	52
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract]
Options & SOSARs outstanding at beginning of period, Weighted-Average Exercise Price	$ 21.83
Options exercised, Weighted-Average Exercise Price	21.83
Options & SOSARs cancelled / forfeited, Weighted-Average Exercise Price	0.00
Options and SOSARs outstanding at end of period, Weighted-Average Exercise Price	$ 0.00	$ 21.83
Options and SOSARs outstanding at end of period, Aggregate Intrinsic Value	$ 0
Total intrinsic value of SOSARs exercised	0	$ 5,193	$ 4,678
Total fair value of shares vested	$ 0	$ 0	$ 576