XML 40 R30.htm IDEA: XBRL DOCUMENT v2.4.0.6
Mortgage Servicing Rights and Mortgage Servicing Activity (Tables)
 3 Months Ended
Mar. 31, 2012
Transfers and Servicing [Abstract]  
Changes in the carrying amount of mortgage servicing rights
Changes in the carrying amount of mortgage servicing rights and mortgage servicing rights valuation allowance are as follows:
 
Quarter ended
March 31,
 
2012
 
2011
Balance at beginning of period
$
21,179

 
$
21,317

Additions
1,394

 
1,308

Amortization
(1,627
)
 
(1,086
)
Balance at end of period
20,946

 
21,539

Valuation allowance at beginning of period
(3,539
)
 
—

Recoveries
1,346

 
—

Valuation allowance at end of period
(2,193
)
 
—

Mortgage servicing rights, net carrying balance
$
18,753

 
$
21,539

Fair value at end of period
$
18,869

 
$
21,943

 
 
 
 
Changes in Key economics assumptions
 
 
Prepayment speed assumption (annual CPR)
14.3
%
Decrease in fair value from 10% adverse change
$
913

Decrease in fair value from 25% adverse change
2,177

Discount rate assumption
9.7
%
Decrease in fair value from 100 basis point adverse change
$
555

Decrease in fair value from 200 basis point adverse change
1,075

Expected weighted-average life (in months)
79.3