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Income Taxes (Tables)
6 Months Ended
Jun. 30, 2013
Income Tax Disclosure [Abstract]  
Reconciliation of Unrecognized Tax Benefits [Table Text Block]
A reconciliation of the beginning and ending amount of unrecognized tax benefits is as follows:
 
2013
 
(in thousands)
Balance at January 1,
$
15,723

Additions based on tax positions related to current year
388

Additions for tax positions of prior years
367

Reductions for tax positions of prior years
(51
)
Reductions due to lapse of applicable statute of limitations
(1,984
)
Settlements

Balance at June 30,
$
14,443