Stockholders' Equity (Narrative) (Details) (USD $)	0 Months Ended		3 Months Ended		9 Months Ended
	May 22, 2014	Jan. 06, 2014	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted average diluted shares outstanding excludes shares of common stock subject to stock options			322,542	324,002	322,542	332,391
Special cash dividend (in usd per share)		$ 2.00
Special dividend, stock per share or unit		$ 2.00
Reduction in exercise price for all outstanding stock options		$ 2.00
Deferred stock units issued to executive officers			43,188
Deferred stock units issued to executive officers, exercise price			$ 45.98
Deferred stock units issued to executive officers, aggregate fair value			2,000,000
Increase in shares authorized	1,678,632
Common Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Payments of special dividends		46,700,000
Deferred Stock Units, Restricted Stock and Stock Awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Special dividend, aggregate value		$ 1,800,000