General form of registration statement for all companies including face-amount certificate companies

Accumulated Other Comprehensive Income (Loss) (Detail)

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Accumulated Other Comprehensive Income (Loss) (Detail) (USD $)
In Thousands, unless otherwise specified
 6 Months Ended
Jun. 30, 2013
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2009
Jun. 30, 2013
Change Related to Cash Flow Hedges
Jun. 30, 2013
Accumulated Other Comprehensive Income (Loss)
Jun. 30, 2013
Change Related to Shipboard Retirement Plan
Accumulated Other Comprehensive Income (Loss) [Line Items]                
Accumulated other comprehensive income (loss) at beginning of year $ 2,384,293 $ 2,018,784 $ 1,844,463 $ 1,740,526 $ 1,713,040 $ (7,872) $ (17,619) $ (9,747)
Current period other comprehensive loss before reclassifications           (28,046) (28,046)  
Amounts reclassified from accumulated other comprehensive income (loss)           (1,971) [1] (1,742) 229 [2]
Accumulated other comprehensive income (loss) at end of year $ 2,384,293 $ 2,018,784 $ 1,844,463 $ 1,740,526 $ 1,713,040 $ (37,889) [3] $ (47,407) $ (9,518)
[1] Amount reclassified to fuel expense.
[2] Amortization of prior-service cost and actuarial loss reclassified to payroll and related expense.
[3] Of the existing amounts related to derivatives designated as cash flow hedges, $5.0 million is expected to be reclassified into earnings in the next 12 months.