Earnings (Loss) Per Share Data (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Earnings (loss) per common share - Basic:
Net income	$ 0.53	$ 0.50
Effect of Dilutive Securities [Abstract]
Convertible Securities	$ 71	$ 71
Stock options, warrants and awards	0	0
Convertible Securities (in shares)	3,753,000	4,320,000
Stock options, warrants and awards, common shares (in shares)	503,000	693,000
Earnings (loss) per common share - Diluted:
Net income plus assumed conversions	54,425	55,810
Diluted shares (in shares)	107,466,000	116,500,000
Diluted earnings per share (per share)	$ 0.51	$ 0.48
Aggregate number of stock options, warrants and awards excluded from the computation of diluted EPS (in shares)	1,500,000	1,800,000
Income (Loss) from Continuing Operations, Including Portion Attributable to Noncontrolling Interest	$ 54,354	$ 55,739