Income Tax Matters (Details Textual) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended		9 Months Ended
	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011	Jun. 30, 2010	Sep. 30, 2009	Dec. 31, 2010
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
The foreign currency impact on unrecognized tax benefits, interest and penalties resulted in a increase to currency translation adjustment			$ (0.3)
Income Tax Matters (Textuals) [Abstract]
Income tax provision	3.1	1.1	9.5	7.3
Effective tax rate			37.50%
Valuation allowance due to change in tax law			0.8
Change in effective tax rate			3.20%
Increase (decrease) in accrued interest and penalties			0.6	0.2
Increase in effective tax rate due to unrecognized tax benefits			2.40%
Non-deductible compensation expense			0.2
Increase in effective tax rate due to non-deductible compensation expense			0.60%
Net operating loss carryforwards						882.6
NOL carry forwards relates to the excess tax benefits from employee restricted stock						1.7
Alternate minimum tax						31.1
Valuation allowance against deferred tax assets	19.3		19.3			20.1
Canadian provincial income tax assessment settlement					7.9
Accrued tax reserve arises due to Canadian Provincial income tax assessment	1.2		1.2			1.1
Unrecognized tax benefits	15.6		15.6			15.0
Accrued Interest and penalties related to these unrecognized tax benefits	7.1		7.1			6.6
Accrued interest and penalties related to these unrecognized tax benefits current	0.4		0.4			0.4
Decrease in unrecognized tax benefit due to the resolution of certain tax audits and expirations of various statutes of limitation	1.7		1.7
FIN 48 [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
The foreign currency impact on unrecognized tax benefits, interest and penalties resulted in a increase to currency translation adjustment			$ 0.4