Quarterly report pursuant to Section 13 or 15(d)

Accumulated Other Comprehensive Income (Loss) (Details)

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Accumulated Other Comprehensive Income (Loss) (Details) (USD $)
In Thousands, unless otherwise specified
9 Months Ended
Sep. 30, 2013
Changes in Accumulated other comprehensive income (loss)  
Balance at the beginning of the period $ (12,243)
Unrealized gain on derivatives recognized through Accumulated other comprehensive income (loss) 3,830
Reclassifications of unrealized loss on derivatives into net income 3,574
Balance at the end of the period $ (4,839)