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INCOME TAXES composition of income tax expense (benefit) (Details) (USD $)
In Thousands, unless otherwise specified
 3 Months Ended 12 Months Ended
Dec. 31, 2012
Sep. 30, 2012
Jun. 30, 2012
Mar. 31, 2012
Dec. 31, 2011
Sep. 30, 2011
Jun. 30, 2011
Mar. 31, 2011
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Operating Loss Carryforwards [Line Items]                      
Current Federal Tax Expense (Benefit)                 $ (1,802) $ 1,800 $ 190
Current State and Local Tax Expense (Benefit)                 2 2 (3)
Current Foreign Tax Expense (Benefit)                 676 88 461
Current Income Tax Expense (Benefit)                 (1,124) 1,890 648
Deferred Federal Income Tax Expense (Benefit)                 (1,434) (14,571) 0
Deferred State and Local Income Tax Expense (Benefit)                 0 0 0
Deferred Foreign Income Tax Expense (Benefit)                 (398) (86) 23
Deferred Income Tax Expense (Benefit)                 (1,832) (14,657) 23
Income Tax Expense (Benefit) $ (480) $ (1,487) $ (1,064) $ 75 $ (695) $ (12,111) $ (26) $ 65 $ (2,956) $ (12,767) $ 671