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Intangible Assets (Tables)
6 Months Ended
Jun. 30, 2015
Intangible Assets  
Schedule of changes in mortgage servicing rights (MSRs)
Three Months Ended June 30, Six Months Ended June 30,
(in thousands) 2015 2014 2015 2014
Balance at beginning of period $ 2,662 $ 3,040 $ 2,762 $ 3,036
Originated mortgage servicing rights 107 72 227 122
Changes in fair value:
Due to change in model inputs and assumptions (1) 128 (36 ) 87 70
Other changes in fair value (2) (170 ) (165 ) (349 ) (317 )
Balance at end of period $ 2,727 $ 2,911 $ 2,727 $ 2,911

(1) The change in fair value resulting from changes in valuation inputs or assumptions used in the valuation model reflects the change in discount rates and prepayment speed assumptions primarily due to changes in interest rates.

(2) Other changes in fair value reflect changes due to customer payments and passage of time.

Schedule of key data and assumptions used in estimating the fair value of the Company's MSRs
    Six Months Ended June 30,  
    2015     2014  
Weighted average constant prepayment rate     10.66 %     9.69 %
Weighted average note rate     3.92 %     4.00 %
Weighted average discount rate     9.34 %     9.15 %
Weighted average expected life (in years)     5.70       6.00