Stock-Based Compensation (Summary of Options Outstanding) (Details) - USD ($)	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]
Shares, Outstanding, beginning of year	0	10,000	20,000
Shares, Exercised	0	(927)	(3,872)
Shares, Forfeited	0	(9,073)	(6,128)
Shares, Outstanding, end of year	0	0	10,000
Shares, Exercisable, end of year	0	0	10,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract]
Weighted Average Exercise Price, Outstanding, beginning of year (in USD per share)	$ 0.00	$ 21.55	$ 21.59
Weighted Average Exercise Price, Exercised (in USD per share)	0.00	21.55	21.63
Weighted Average Exercise Price, Forfeited (in USD per share)	0.00	21.55	21.63
Weighted Average Exercise Price, Outstanding, end of year (in USD per share)	0.00	0.00	21.55
Weighted Average Exercise Price, Exercisable, end of year (in USD per share)	$ 0.00	$ 0.00	$ 21.55
Aggregate Intrinsic Value, end of year	$ 0