Shareholders' Equity and Stock-Based Compensation (Details 2) (USD $)	0 Months Ended	1 Months Ended	12 Months Ended
	Dec. 18, 2013	Jan. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Summary of common shares issued, treasury shares and shares outstanding
Balance at the beginning of the period (in shares)		48,304,000	45,281,329	48,304,000	51,073,000
Stock options exercised (in shares)				8,000	174,000
Share repurchases (in shares)			(4,852,000)	(3,493,000)	(3,606,000)
Restricted stock shares and restricted stock units (in shares)			262,000	256,000	396,000
Other (in shares)			167,000	206,000	267,000
Balance at the end of the period (in shares)			40,858,006	45,281,329	48,304,000
Common Stock
Authorized shares			200,000,000
Par value (in dollars per share)			10.00
Summary of common shares issued, treasury shares and shares outstanding
Balance at the beginning of the period (in shares)		99,454,000	99,801,000	99,454,000	98,702,000
Stock options exercised (in shares)				8,000	174,000
Restricted stock shares and restricted stock units (in shares)			96,000	133,000	311,000
Other (in shares)			167,000	206,000	267,000
Balance at the end of the period (in shares)			100,064,000	99,801,000	99,454,000
Common Stock In Treasury
Summary of common shares issued, treasury shares and shares outstanding
Balance at the beginning of the period (in shares)		(51,150,000)	(54,520,000)	(51,150,000)	(47,629,000)
Share repurchases (in shares)	(115,000)	(1,514,000)	(4,852,000)	(3,493,000)	(3,606,000)
Restricted stock shares and restricted stock units (in shares)			166,000	123,000	85,000
Balance at the end of the period (in shares)			(59,206,000)	(54,520,000)	(51,150,000)