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Consolidated Statements of Comprehensive Income (USD $) In Thousands, unless otherwise specified | 12 Months Ended
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Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2011
Statement Of Income And Comprehensive Income [Abstract] |  |  |
Net income (loss) | $ 81,618 | $ 89,101 | $ 76,254
Other comprehensive income (loss) before taxes: |  |  |
Change in fair value of interest rate swap agreements | 17,143 | 2,722 | (4,019)
Change in pension actuarial income (loss) | 1,212 | (258) | (508)
Total other comprehensive income (loss) before taxes | 18,355 | 2,464 | (4,527)
Provision for income tax benefit (expense) related to components of other comprehensive income (loss) | (6,974) | (937) | 1,720
Other comprehensive income (loss) | 11,381 | 1,527 | (2,807)
Comprehensive income (loss) | $ 92,999 | $ 90,628 | $ 73,447

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- Definition Amount after tax of increase (decrease) in equity from transactions and other events and circumstances from net income and other comprehensive income, attributable to parent entity. Excludes changes in equity resulting from investments by owners and distributions to owners. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Other Comprehensive Income -URI http://asc.fasb.org/extlink&oid=6519514 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Comprehensive Income -URI http://asc.fasb.org/extlink&oid=16317811 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=28358780&loc=d3e557-108580 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Net Income -URI http://asc.fasb.org/extlink&oid=6518256 + Details
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