Stock-Based Compensation (Narrative) (Details) (USD $)	12 Months Ended				12 Months Ended	1 Months Ended	12 Months Ended			12 Months Ended	1 Months Ended	12 Months Ended			12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2013 Equity Ownership Plan 2003 [Member]	Dec. 31, 2013 Equity Ownership And Long-Term Cash Incentive Plan 2007 [Member]	Jan. 31, 2013 Equity Ownership And Long Term Cash Incentive Plan 2011 [Member]	Dec. 31, 2013 Equity Ownership And Long Term Cash Incentive Plan 2011 [Member]	Dec. 31, 2013 Incentive Stock Options [Member]	Dec. 31, 2013 Incentive Stock Options [Member] Equity Ownership And Long Term Cash Incentive Plan 2011 [Member]	Dec. 31, 2013 Restricted Awards [Member]	Jan. 31, 2013 Restricted Awards [Member] Equity Ownership And Long Term Cash Incentive Plan 2011 [Member]	Dec. 31, 2013 Restricted Awards [Member] Equity Ownership And Long Term Cash Incentive Plan 2011 [Member]	Dec. 31, 2013 Maximum [Member] Equity Ownership And Long-Term Cash Incentive Plan 2007 [Member]	Dec. 31, 2013 Maximum [Member] Incentive Stock Options [Member] Equity Ownership And Long Term Cash Incentive Plan 2011 [Member]	Dec. 31, 2013 Year One [Member] Incentive Stock Options [Member]	Dec. 31, 2013 Year One [Member] Restricted Awards [Member]	Dec. 31, 2013 Year Two [Member] Incentive Stock Options [Member]	Dec. 31, 2013 Year Two [Member] Restricted Awards [Member]	Dec. 31, 2013 Year Three [Member] Incentive Stock Options [Member]	Dec. 31, 2013 Year Three [Member] Restricted Awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares available for grant				784,998	1,099,255		2,974,841		2,000,000		361,700			2,000,000
Number of shares authorized					7,000,000		5,500,000						2,000,000
Expiration of stock-based awards					10 years		10 years	10 years
Percentage of awards vesting															33.33%	33.33%	33.33%	33.33%	33.33%	33.33%
Percentage of after tax net profit to be retained by the executive officer to achieve ownership position	75.00%
Weighted-average grant-date fair value of options granted (in USD per share)	$ 8.00	$ 9.42	$ 11.48			$ 65.36					$ 64.60
Total intrinsic value of options exercised	$ 5,700,000	$ 39,800,000	$ 29,600,000
Options outstanding, Aggregate intrinsic value (in usd per share)	0
Intrinsic value of in the money stock options	2,900,000
Total fair value of vested options	11,000,000	11,000,000	16,000,000
Cost related to non-vested stock options outstanding not yet recognized	5,000,000
Recognition period	1 year 8 months 12 days
Stock-based compensation plans award vesting period	3 years											3 years
Long term incentive plan awards (in shares)						201,474
Average award vesting period										36 months
Number of unvested restricted units expected to vest										85,335
Period expected for vesting unvested restricted units										17 months
Compensation paid for awards										$ 2,100,000