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Federal Home Loan Bank and Federal Reserve Bank Stock
3 Months Ended
Mar. 31, 2021
Federal Home Loan Banks [Abstract]  
Federal Home Loan Bank and Federal Reserve Bank Stocks Federal Home Loan Bank and Federal Reserve Bank Stocks
Federal Home Loan Bank ("FHLB") and Federal Reserve Bank ("FRB") stocks were as follows:
(In thousands)At March 31, 2021At December 31, 2020
FHLB stock, at cost$234,455 $196,457 
FRB stock, at cost123,959 123,979 
Total investments$358,414 $320,436 

The investments in FHLB stock are required investments related to the Corporation's membership and borrowings in 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. The Corporation periodically evaluates investments for impairment. There was no impairment of these investments at March 31, 2021 and December 31, 2020.