Earnings (Loss) Per Share Data (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Earnings Per Share [Abstract]
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	$ 33,970	$ 21,971	$ 111,359	$ 85,745
Earnings (loss) per common share - Basic:
Net income	$ 0.35	$ 0.23	$ 1.15	$ 0.88
Effect of Dilutive Securities [Abstract]
Convertible Securities	$ 66	$ 66	$ 132	$ 132
Stock options, warrants and awards	$ 0	$ 0	$ 0	$ 0
Convertible Securities (in shares)	8,356	8,440	7,192	8,452
Stock options, warrants and awards, common shares (in shares)	601	615	524	677
Income from continuing operations plus assumed conversions	$ 34,036	$ 61,312	$ 111,491	$ 125,016
Earnings (loss) per common share - Diluted:
Net income plus assumed conversions	$ 34,036	$ 22,037	$ 111,491	$ 85,877
Diluted shares	105,212	106,054	104,203	106,906
Diluted earnings per share	$ 0.32	$ 0.21	$ 1.07	$ 0.80
Income (Loss) from Continuing Operations, Including Portion Attributable to Noncontrolling Interest	$ 33,970	$ 61,246	$ 111,359	$ 124,884
Income (Loss) from Continuing Operations, Per Basic Share	$ 0.35	$ 0.63	$ 1.15	$ 1.28
Income (Loss) from Discontinued Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest	$ 0	$ (39,275)	$ 0	$ (39,139)
Income (Loss) from Discontinued Operations and Disposal of Discontinued Operations, Net of Tax, Per Diluted Share	$ 0.00	$ (0.37)	$ 0.00	$ (0.37)
Income (Loss) from Discontinued Operations and Disposal of Discontinued Operations, Net of Tax, Per Basic Share	0.00	(0.40)	0.00	(0.40)
Income (Loss) from Continuing Operations, Per Diluted Share	$ 0.32	$ 0.58	$ 1.07	$ 1.17
Weighted Average Number of Shares Outstanding, Basic	96,255	96,999	96,487	97,777