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Federal Home Loan Bank and Federal Reserve Bank Stocks
 12 Months Ended
Dec. 31, 2019
Federal Home Loan Banks [Abstract]  
Federal Home Loan Bank and Federal Reserve Bank Stocks Federal Home Loan Bank and Federal Reserve Bank Stocks

Investments were as follows:
 
At December 31,
(In thousands)
2019
 
2018
Federal Home Loan Bank stock, at cost
$
318,473

 
$
54,019

Federal Reserve Bank stock, at cost
123,967

 
37,635

Total investments
$
442,440

 
$
91,654



The investments in FHLB stock are required investments related to the Corporation's membership in and borrowings from the FHLB of Des Moines, and additional commitments from the FHLB of Indianapolis and Cincinnati. The Corporation's investments in the FHLB of Des Moines, Indianapolis and Cincinnati could be adversely impacted by the financial operations of the Federal Home Loan Banks and actions of their regulator, the Federal Housing Finance Agency. The amount of FRB stock that TCF Bank is required to hold is based on TCF Bank's capital structure. We periodically evaluate investments for other than temporary impairment. There was no impairment of these investments in 2019, 2018 and 2017.