Employee Benefits (Details Textual) (USD $) In Millions, unless otherwise specified	6 Months Ended
Jun. 30, 2012
Employee Benefits (Textual) [Abstract]
Contribution to pension plan required to be made in fiscal 2012	$ 4.1
Defined benefit plan employer minimum required contribution for the 2011 plan year to be made in fiscal 2012	1.2
Defined benefit employer minimum required contribution for the 2012 plan year to be made in 2012	2.9
Total defined benefit employer minimum required contribution related to the 2012 plan year	5.4
Funded minimum required contribution	0.4
Remaining amount of the 2011 minimum required contribution expected to be funded in fiscal 2012	$ 0.8
Period of time the requested 2012 minimum required contribution waiver will be deferred and amortized over if granted	5 years

Contribution to pension plan required to be made in fiscal 2012.

No definition available.

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Defined benefit employer minimum required contribution for the 2011 plan year to be made in fiscal 2012.

No definition available.

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Defined benefit employer minimum required contribution for the 2012 plan year to be made in 2012.

No definition available.

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Total defined benefit plan employer minimum required contribution related to the 2012 plan year.

No definition available.

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Defined Benefit Employer 2011 minimum required contribution funded to date.

No definition available.

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Period of time the requested 2012 minimum required contribution waiver will be deferred and amortized over if granted.

No definition available.

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Remaining amount of the 2011 minimum required contribution expected to be funded in fiscal 2012.

No definition available.

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