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CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (unaudited) (USD $) In Thousands, unless otherwise specified | 3 Months Ended
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Mar. 31, 2014 | Mar. 31, 2013
Statement Of Income And Comprehensive Income [Abstract] |  |
Net income | $ 13,549 | $ 11,959
Other comprehensive income (loss), net of taxes | 112 |
Comprehensive income (loss) | $ 13,661 | $ 11,959

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