Quarterly report pursuant to Section 13 or 15(d)

Significant Accounting Policies (Narrative) (Details)

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Significant Accounting Policies (Narrative) (Details) (USD $)
0 Months Ended 3 Months Ended 6 Months Ended
Sep. 07, 2012
Jun. 30, 2013
Dec. 31, 2012
Sep. 30, 2012
Jun. 30, 2012
Jun. 30, 2013
Jun. 30, 2012
Accounting Policies [Abstract]              
Prior Period Adjustment   $ 6,800,000 $ 6,500,000 $ 6,000,000 $ 5,900,000 $ 12,700,000 $ 11,600,000
Debt and Capital Lease Obligations   228,797,000 240,407,000     228,797,000  
Long-term Debt, Fair Value   $ 237,400,000 $ 247,900,000     $ 237,400,000  
Stockholders' Equity Note, Stock Split, Conversion Ratio 1.5