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Condensed Consolidated Statements of Comprehensive Income (Unaudited) (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2013 | Jun. 30, 2012 | Jun. 30, 2013 | Jun. 30, 2012
Condensed Consolidated Statements of Comprehensive Income [Abstract] |  |  |  |
Net income (loss) | $ 8,916 | $ 28,179 | $ 30,207 | $ 48,677
Other comprehensive income (loss) before taxes: |  |  |  |
Change in fair value of interest rate swap agreements | 10,146 | (2,746) | 13,027 | 61
Provision for income tax benefit (expense) related to: |  |  |  |
Change in fair value of interest rate swap agreements | (3,856) | 1,044 | (4,950) | (22)
Other comprehensive income (loss) | 6,290 | (1,702) | 8,077 | 39
Comprehensive income (loss) | $ 15,206 | $ 26,477 | $ 38,284 | $ 48,716

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