Retirement of Former Chief Executive Officer (Details) (Chief Executive Officer [Member], USD $)	0 Months Ended		12 Months Ended	0 Months Ended		0 Months Ended
	Jun. 30, 2011	Jun. 30, 2011 Stock Options [Member]	Dec. 31, 2011 SG&A [Member]	Jun. 30, 2011 Severance Payment [Member]	Jun. 30, 2011 Lifetime Health and Medical Coverage Payment [Member]	Jun. 30, 2011 Other Deferred Compensation Payments [Member]
Postemployment Benefits [Line Items]
Postretirement benefits, payable period				18 months		18 months
Postretirement benefits, recorded liability				$ 5,250,000	$ 1,000,000	$ 750,000
Postretirement benefits, deferral period	6 months
Share-based payment award, expiration period		5 years
Severance expense			$ 8,700,000