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Schedule IV Reinsurance
 12 Months Ended
Dec. 31, 2016
Reinsurance Insurance Premiums Earned [Abstract]  
Supplemental Schedule of Reinsurance Premiums for Insurance Companies [Text Block]
Radian Group Inc.
Schedule IV—Reinsurance
Insurance Premiums Earned
Year Ended December 31, 2016, 2015 and 2014

($ in thousands)
Gross
Amount
 
Ceded to
Other
Companies
 
Assumed
from
Other
Companies
 
Net Amount
 
Assumed
Premiums as a
Percentage
of Net
Premiums
2016
$
999,093

 
$
77,359

 
$
35

 
$
921,769

 
0.00
%
2015
$
973,645

 
$
57,780

 
$
43

 
$
915,908

 
0.00
%
2014
$
905,502

 
$
61,017

 
$
43

 
$
844,528

 
0.01
%