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Income Taxes Provision Current & Deferred Table (Tables)
12 Months Ended
Dec. 31, 2015
Income Tax Expense Disclosure [Abstract]  
Schedule of Components of Income Tax Expense (Benefit) [Table Text Block]
 
 
Year Ended December 31,
 
 
2015
 
2014
 
2013
 
 
(in thousands)
Current
 
$
61,040

 
$
55,572

 
$
43,547

Deferred
 
3,254

 
(7,182
)
 
(13,717
)
Total tax provision
 
$
64,294

 
$
48,390

 
$
29,830