Long-Term Debt, Short-Term Debt and Financing Arrangements (Details Textual 1) (Term Loan B Facility, Senior Credit Facility [Member], USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2011
Term Loan B Facility, Senior Credit Facility [Member]
Debt Instrument [Line Items]
Quarterly principal repayment of term loan	$ 375