Quarterly report pursuant to Section 13 or 15(d)

Income Tax Benefit/Expense (Details Textual)

v2.4.0.6
Income Tax Benefit/Expense (Details Textual) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 6 Months Ended
Jun. 30, 2012
Jun. 30, 2011
Jun. 30, 2012
Jun. 30, 2011
Income Tax Benefit/Expense (Textual) [Abstract]        
Income tax expense $ 9,817 $ 13,464 $ 24,460 $ 18,303