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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Comprehensive Income (Loss) (Parenthetical) (Detail) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 6 Months Ended
Jun. 30, 2013
Jun. 30, 2012
Jun. 30, 2013
Jun. 30, 2012
Benefit from income taxes on realized gains on marketable securities reclassified to gain on sale of marketable securities     $ (2,757) $ (9,318)
Benefit from income taxes on unrealized gain from derivatives       (161)
Provision for (benefit from) income taxes on unrealized gains on marketable securities    $ (682) $ 377 $ 1,843