Quarterly report pursuant to Section 13 or 15(d)

Consolidated Statements of Comprehensive Income

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Consolidated Statements of Comprehensive Income (USD $)
In Thousands, unless otherwise specified
3 Months Ended
Mar. 31, 2013
Mar. 31, 2012
Statement of Other Comprehensive Income [Abstract]    
Net income $ 31,544 $ 26,170
Other comprehensive (loss) income, net of tax:    
Change in fair value of derivative instrument, net of tax 55 0
Other comprehensive income, net of tax 55 0
Comprehensive income $ 31,599 $ 26,170