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Qualified Affordable Housing
12 Months Ended
Dec. 31, 2016
Investments in Affordable Housing Projects [Abstract]  
Qualified Affordable Housing Program
QUALIFIED AFFORDABLE HOUSING 
We invest in affordable housing projects primarily to satisfy our Community Reinvestment Act requirements. As a limited partner in these operating partnerships, we receive tax credits and tax deductions for losses incurred by the underlying properties. We use the cost method to account for these partnerships. Our total investment in qualified affordable housing projects was $11.7 million at December 31, 2016 and $15.0 million at December 31, 2015. We had no open commitments to fund current or future investments in qualified affordable housing projects at December 31, 2016 or December 31, 2015. Amortization expense, included in other noninterest expense in the Consolidated Statements of Net Income, was $3.3 million, $3.6 million and $4.1 million for December 31, 2016, 2015 and 2014. The amortization expense was offset by tax credits of $3.7 million, $4.0 million and $4.3 million for December 31, 2016, 2015 and 2014, as a reduction to our federal tax provision.