Stock-Based Compensation and Other Incentive Plans (Schedule of Stock Option Activity Under Incentive Plan) (Details) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2015 USD ($) $ / shares shares
Common Shares
Options outstanding at beginning of period	682
Cancelled, Common Shares	(17)
Expired, Common Shares	(10)
Options outstanding at end of period	655
Weighted Average Exercise Price
Options outstanding at beginning of period (in dollars per share) | $ / shares	$ 198.41
Canceled (in dollars per share) | $ / shares	151.72
Expired (in dollars per share) | $ / shares	300.62
Options outstanding at end of period (in dollars per share) | $ / shares	$ 198.15
Options exercisable at period end	488
Options exercisable at end of period weighted average exercise price (in dollars per share) | $ / shares	$ 213.00
Options outstanding at end of period aggregate intrinsic value | $	$ 0
Options exercisable at end of period aggregate intrinsic value | $	$ 0
Options outstanding at end of period average remaining life	4 years 7 months 6 days
Options exercisable at end of period average remaining life	4 years 4 months 24 days
Unvested options at end of period	167