Quarterly report pursuant to Section 13 or 15(d)

Accumulated Other Comprehensive Income (Loss) (Parenthetical) (Detail)

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Accumulated Other Comprehensive Income (Loss) (Parenthetical) (Detail) (Change Related to Cash Flow Hedges, USD $)
In Thousands, unless otherwise specified
3 Months Ended
Mar. 31, 2013
Change Related to Cash Flow Hedges
 
Other Comprehensive Income (Loss) [Line Items]  
Amount expected to be reclassified into earnings $ 6,300