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

Effects of Foreign Currency Options Designated as Cash Flow Hedges (Detail)

v2.4.0.8
Effects of Foreign Currency Options Designated as Cash Flow Hedges (Detail) (Cash Flow Hedging, Foreign Exchange Option, USD $)
In Thousands, unless otherwise specified
 3 Months Ended 6 Months Ended 12 Months Ended
Jun. 30, 2013
Jun. 30, 2012
Jun. 30, 2013
Jun. 30, 2012
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Cash Flow Hedging | Foreign Exchange Option
              
Fair Value, Option, Quantitative Disclosures [Line Items]              
Loss recognized in other comprehensive (loss) - effective portion $ (341) $ (12,193) $ (4,353) $ (17,035) $ (19,428) $ (14,583) $ (1,125)
Gain (loss) recognized in other income (expense) - ineffective portion         (864) (239) 20
Loss recognized in other income (expense)- ineffective portion (22) (81) (320) (350)      
Effect of derivative on consolidated financial statements         (20,292) (14,822) (1,105)
Amount reclassified from accumulated other comprehensive income (loss) into depreciation expense $ 117   $ 117