Debt Credit Facility Narrative (Details) (USD $)	3 Months Ended		15 Months Ended									21 Months Ended	30 Months Ended							3 Months Ended													3 Months Ended		3 Months Ended
	Mar. 31, 2012	Jun. 30, 2011 Preceding credit facility revolver [Member]	Jul. 14, 2011 Preceding credit faciity term loan [Member]	Jun. 30, 2011 Preceding credit faciity term loan [Member]	Jun. 30, 2012 Fiscal quarters ending 6/30/2012-12/31/2012 [Member]	Jun. 30, 2012 Fiscal quarter ending 3/31/2013 [Member]	Jun. 30, 2012 Fiscal quarter ending 6/30/2013 [Member]	Jun. 30, 2012 Fiscal quarter ending 9/30/2013 [Member]	Jun. 30, 2012 Fiscal quarter ending 12/31/2013 and the end of any fiscal quarter ended thereafter [Member]	Jun. 30, 2012 Fiscal quarters ending 6/30/2012 through 6/30/2013 [Member]	Jun. 30, 2012 Fiscal quarter ending 9/30/2013 and the end of any fiscal quarter ended thereafter [Member]	Jun. 30, 2013 Credit facility term loan [Member]	Mar. 31, 2016 Credit facility term loan [Member]	Jun. 30, 2012 Credit facility term loan [Member]	Dec. 31, 2011 Credit facility term loan [Member]	Jun. 30, 2012 Credit Facility Term Loan and Revolver [Member]	Jun. 30, 2012 Fiscal year 2012 [Member]	Jun. 30, 2012 Fiscal year 2013 [Member]	Jun. 30, 2012 Fiscal year 2014 and thereafter [Member]	Jun. 30, 2012 Credit facility revolving loan [Member]	Dec. 31, 2011 Credit facility revolving loan [Member]	Jun. 30, 2012 Letter of credit during Covenant Amendment Period [Member]	Jun. 30, 2012 LIBOR [Member] Credit Facility Term Loan and Revolver [Member]	Jun. 30, 2012 Base Rate [Member] Credit Facility Term Loan and Revolver [Member]	Jun. 30, 2012 LIBOR Minimum [Member] Credit facility term loan [Member]	Jun. 30, 2012 LIBOR Minimum [Member] Credit facility revolving loan [Member]	Jun. 30, 2012 LIBOR Maximum [Member] Credit facility term loan [Member]	Jun. 30, 2012 LIBOR Maximum [Member] Credit facility revolving loan [Member]	Jun. 30, 2012 Base Rate Minimum [Member] Credit facility term loan [Member]	Jun. 30, 2012 Base Rate Minimum [Member] Credit facility revolving loan [Member]	Jun. 30, 2012 Base Rate Maximum [Member] Credit facility term loan [Member]	Jun. 30, 2012 Base Rate Maximum [Member] Credit facility revolving loan [Member]	Jun. 30, 2012 Minimum [Member] Credit facility revolving loan [Member]	Jun. 30, 2012 Minimum [Member] Letter of Credit after Covenant Amendment Period [Member]	Jun. 30, 2012 Maximum [Member] Credit facility revolving loan [Member]	Jun. 30, 2012 Maximum [Member] Letter of Credit after Covenant Amendment Period [Member]
Debt Instrument [Line Items]
Term loan original issuance amount														$ 330,000,000
Line of credit facility, maximum borrowing capacity		150,000,000																		150,000,000
Line of credit facility, increased borrowing capacity																50,000,000
Synthetic leases, amount outstanding																57,000,000
Leverage ratio					6.50	5.75	4.50	4.00	3.50
Fixed charge ratio										1.00	1.15
Capital expenditures limit for debt																	125,000,000	85,000,000	150,000,000
Available Liquidity required during Covenant Amendment Period																50,000,000
Debt instrument, basis spread on variable rate																							4.75%	3.75%	3.00%	2.75%	3.75%	3.50%	2.00%	1.75%	2.75%	2.50%
Letter of credit fee																						4.75%												2.75%		3.50%
Long-term Debt, Percentage Bearing Variable Interest, Percentage Rate				4.00%										5.00%	3.56%
Required quarterly principal payments on Term Loan			5,000,000									4,000,000	8,000,000
Line of credit facility, commitment fee percentage		0.50%																		0.75%													0.375%		0.50%
Line of Credit Facility, Increase, Additional Borrowings	30,000,000
Line of Credit Facility, Decrease, Repayments	30,000,000
Line of credit, amount outstanding																				20,000,000
Letters of credit outstanding, amount		22,000,000																		21,000,000	26,000,000
Line of credit facility, remaining borrowing capacity		128,000,000																		109,000,000	124,000,000
Line of credit facility, sublimit for letters of credit																				100,000,000
Line of credit sublimit for non-US currency letters of credit																				$ 50,000,000