Share-Based Compensation (Stock Option Activity) (Details) (USD $) In Thousands, except Share data, unless otherwise specified	1 Months Ended	6 Months Ended
	Mar. 21, 2008	Dec. 31, 2011
Share-Based Compensation [Abstract]
Outstanding at June 30, 2011, Shares		2,489,998
Granted, Shares	330,470	490,775
Exercised, Shares		(63,638)
Forfeited or expired, Shares		(115,639)
Outstanding at December 31, 2011, Shares		2,801,476
Exercisable at December 31, 2011, Shares		1,777,831
Outstanding at June 30, 2011, Weighted Average Exercise Price Per Share		$ 56.39
Granted, Weighted Average Exercise Price Per Share		$ 34.98
Exercised, Weighted Average Exercise Price Per Share		$ 27.68
Forfeited or expired, Weighted Average Exercise Price Per Share		$ 64.43
Outstanding at December 31, 2011, Weighted Average Exercise Price Per Share		$ 52.96
Exercisable at December 31, 2011, Weighted Average Exercise Price Per Share		$ 60.46
Outstanding at June 30, 2011, Weighted Average Remaining Contractual Term (Years)		6.36
Outstanding at December 31, 2011, Weighted Average Remaining Contractual Term (Years)		6.58
Exercisable at December 31, 2011, Weighted Average Remaining Contractual Term (Years)		5.46
Outstanding at June 30, 2011, Aggregate Intrinsic Value		$ 19,270
Outstanding at December 31, 2011, Aggregate Intrinsic Value		10,061
Exercisable at December 31, 2011, Aggregate Intrinsic Value		$ 5,174