Borrowings (Tables)

12 Months Ended

Dec. 31, 2011

Borrowings [Abstract]

Components Of Long-Term Debt

	2011			2010
	(Dollars in thousands)
Senior Credit Facility:
Term loan facility, at an average rate of 1.31%, due 10/1/2012	$	—		$	36,123
Term loan facility, at a rate of 2.625%, due 10/1/2014		375,000			363,877
2004 Senior Notes:
6.66% Series 2004-1 Tranche A Senior Notes due 7/8/2011		—			72,500
7.14% Series 2004-1 Tranche B Senior Notes due 7/8/2014		—			48,250
7.46% Series 2004-1 Tranche C Senior Notes due 7/8/2016		—			45,050
3.875% Convertible Senior Subordinated Notes due 2017		400,000			400,000
6.875% Senior Subordinated Notes due 2019		250,000			—
		1,025,000			965,800
Less: Unamortized debt discount on 3.875% Convertible Senior Subordinated Notes due 2017		(70,191	)		(79,891	)
		954,809			885,909
Current portion of borrowings		—			(72,500	)
	$	954,809		$	813,409

Schedule Of Aggregate Amounts Of Long-Term Debt

	(Dollars in thousands)
2012	$	4,986
2013		—
2014		375,000
2015		—
2016 and thereafter		650,000

Schedule Of Interest Expense Amounts Related To Convertible Notes

(in millions)	Year Ended December 31, 2011		Year Ended December 31, 2010
Interest cost related to contractual interest coupon		$15.5	$	6.2
Interest cost related to amortization of the discount	$	9.7	$	3.8

Schedule Of Carrying Value Of The Convertible Notes

(in millions)	December 31, 2011			December 31, 2010
Principal amount of the Convertible Notes	$	400.0		$	400.0
Unamortized discount		(70.2	)		(79.9	)
Net carrying amount	$	329.8		$	320.1