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Other Assets
 12 Months Ended
Dec. 31, 2020
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]  
Other Assets Other Assets
Other assets consisted of the following at December 31, 2020 and 2019:
(in thousands) December 31, 2020December 31, 2019
Derivative assets$342,510 $150,574 
Low-income housing tax credit investments108,549 88,215 
Accrued interest receivable83,804 70,210 
Prepaid expenses30,890 31,456 
Income taxes receivable23,188 16,274 
Investment in unconsolidated trust subsidiaries13,962 13,962 
Insurance premium receivable10,701 10,415 
Commercial servicing asset6,144 5,133 
Other real estate owned1,810 3,295 
Other47,471 44,667 
Total other assets$669,029 $434,201 

The Company invests in limited partnerships that operate qualified affordable housing projects to receive tax benefits in the form of tax deductions from operating losses and tax credits. The Company accounts for the investments using the proportional amortization method; amortization of the investment in qualified affordable housing projects is recorded in the provision for income taxes together with the tax credits and benefits received. As of December 31, 2020, 2019 and 2018, the Company recognized $7.0 million, $3.6 million, and $2.8 million, respectively, of proportional amortization as a component of income tax expense and recognized $8.4 million, $4.3 million, and $3.3 million, respectively, in affordable housing tax credits and other tax benefits during the years. The Company's remaining capital commitments to these partnerships at December 31, 2020 and 2019 were approximately $67.0 million and $60.4 million, respectively, and are included in Other Liabilities.
Other real estate owned represents property acquired through foreclosure or other proceedings and is carried at the lower of cost or fair value, less costs to sell. The Bank's recorded investment in consumer mortgage loans collateralized by residential real estate property in process of foreclosure was $135,000 and $7.3 million as of December 31, 2020 and 2019, respectively.