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Parent Company Stock Based Compensation Restricted Stock Units (Tables)
 12 Months Ended
Dec. 31, 2011
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Schedule of Share-based Compensation, Restricted Stock and Restricted Stock Units Activity [Table Text Block]
The following table summarizes information about RSUs granted to our employees and key executive officers under the parent company stock based compensation programs (RSUs in thousands):
 
 
Successor
 
 
Year Ended December 31, 2012
 
 
Shares
 
Weighted-Average Grant Date Fair Value
 
Weighted-Average Remaining Contractual Term
Outstanding at beginning of period
 
919

 
$
25.24

 
0.8

Granted
 
698

 
22.08

 
 
Forfeited or expired
 
(10
)
 
30.23

 
 
Settled
 
(189
)
 
27.84

 
 
Outstanding at end of period
 
1,418

 
$
23.17

 
0.8

RSUs unvested and expected to vest at December 31, 2012
 
511

 
$
24.40

 
2.1

RSUs vested and payable at December 31, 2012
 
884

 
$
22.44