Annual report pursuant to Section 13 and 15(d)

Deferred Charges - Schedule of Expected Amortization Expense (Details)

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Deferred Charges - Schedule of Expected Amortization Expense (Details) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2012
Expected Amortization Expense [Line Items]  
Future Amortization Expense, Year One $ 11,124
Future Amortization Expense, Year Two 8,937
Future Amortization Expense, Year Three 7,371
Future Amortization Expense, Year Four 6,390
Future Amortization Expense, Year Five 5,146
Finite-Lived Intangible Assets, Net $ 38,968