Long-Term Debt (Details Textual) (USD $) In Millions, unless otherwise specified	6 Months Ended
Jun. 30, 2012
Long-Term Debt (Additional Textual) [Abstract]
Interest rate of term loan facility	225.00%
2008 Term Loan Facility [Member]
Long-Term Debt (Textual) [Abstract]
Debt instrument, maturity date	Mar. 07, 2012
2010 Revolving Credit Facility [Member]
Long-Term Debt (Textual) [Abstract]
Revolving Credit Facility	59.9
Debt instrument, maturity date	Aug. 12, 2013
2011 Term Loan Facility [Member]
Long-Term Debt (Textual) [Abstract]
Debt instrument, maturity date	Aug. 16, 2016

Date when the debt instrument is scheduled to be fully repaid, in CCYY-MM-DD format.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 22

-Article 5

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.22(a)(2))

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 129

-Paragraph 2, 4

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Name:	us-gaap_DebtInstrumentMaturityDate
Namespace Prefix:	us-gaap_
Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration