Stockholders' Equity (Share-Based Payments - Options and Stock Appreciation Rights Outstanding) (Details) (USD $) Share data in Thousands, except Per Share data, unless otherwise specified	3 Months Ended		12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2012	Dec. 31, 2011
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares Available For Grant, Beginning Balance			291
Shares Available For Grant, Exercised			0
Shares Available For Grant, Forfeited			0
Shares Available For Grant, Expired			0
Shares Available For Grant, Granted			0
Shares Available For Grant, Ending Balance	291	291	291	291
Shares/Awards [Roll Forward]
Options Outstanding, Shares, Beginning Balance			86
Options Outstanding, Shares, Exercised			0
Options Outstanding, Shares, Forfeited			(4)
Options Outstanding, Shares, Granted			0
Options Outstanding, Shares, Expired			0
Options Outstanding, Shares, Ending Balance	82	86	82	86
Weighted-Average Exercise Price [Roll Forward]
Options Outstanding, Weighted-Average Exercise Price, Beginning Balance			$ 187.83
Options Outstanding, Weighted-Average Exercise Price, Exercised			$ 0.00
Options Outstanding, Weighted-Average Exercise Price, Forfeited			$ 224.89
Options Outstanding, Weighted-Average Exercise Price, Expired			$ 0.00
Options Outstanding, Weighted-Average Exercise Price, Granted			$ 0.00
Options Outstanding, Weighted-Average Exercise Price, Ending Balance	$ 186.19	$ 187.83	$ 186.19	$ 187.83
Total intrinsic value of options exercised			$ 100,000	$ 600,000
Total intrinsic value of options exercised	73,000	179,000	73,000	179,000
Total fair value of shares vested	500,000	700,000
Total fair value of shares vested			$ 0	$ 513,000
Stock Appreciation Rights (SARs) [Member]
Shares/Awards [Roll Forward]
Options Outstanding, Shares, Beginning Balance			75
Options Outstanding, Shares, Exercised			(3)
Options Outstanding, Shares, Forfeited			(6)
Options Outstanding, Shares, Granted			0
Options Outstanding, Shares, Ending Balance	66		66
Weighted-Average Exercise Price [Roll Forward]
Options Outstanding, Weighted-Average Exercise Price, Beginning Balance			$ 126.64
Options Outstanding, Weighted-Average Exercise Price, Exercised			$ 120.82
Options Outstanding, Weighted-Average Exercise Price, Forfeited			$ 147.13
Options Outstanding, Weighted-Average Exercise Price, Granted			$ 0.00
Options Outstanding, Weighted-Average Exercise Price, Ending Balance	$ 125.03		$ 125.03