Debt (Details Textual) (USD $) In Millions, unless otherwise specified	6 Months Ended								1 Months Ended
	Jun. 30, 2012	Dec. 31, 2011	Apr. 28, 2011	Sep. 30, 2012 Maximum [Member]	Jun. 30, 2012 Maximum [Member]	Sep. 30, 2012 Minimum [Member]	Jun. 30, 2012 Minimum [Member]	Jun. 30, 2012 Top Tier Foreign Subsidiaries [Member]	May 18, 2011 Revolving Credit Facility [Member]
Debt (Additional Textual) [Abstract]
Credit Facility									$ 130
Additional Credit Facility									50
Credit Facility, Period									5 years
Credit Facility expiring									May 18, 2016
Letters of credit									50
Percentage of capital stock of foreign subsidiaries								65.00%
Debt covenant coverage ratio				1	1	2.50	2.25
Fixed Charge, Coverage Ratio					1		2.48
Debt covenant leverage ratio					2.50		1
Leverage ratio					0.37		1
Debt (Textual) [Abstract]
Repayment of outstanding borrowings			4.2
Total debt	2.6
Credit Facility	125.4
Outstanding letters of credit	4.6
The fees on the unused portion of the Credit Facility	0.35%
Minimum cash and cash equivalents balance	50
Estimated fair value of total debt	2.4	3.0
Maximum dividend amount allows to pay under financial covenants	10
Maximum purchase amount of common stock allows to pay under financial covenants	$ 10