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Reserves on Deposit with the Federal Reserve Bank and Federal Bank Stock
 12 Months Ended
Dec. 31, 2018
Reserves on Deposit with the Federal Reserve Bank and Federal Bank Stock [Abstract]  
Reserves on Deposit with the Federal Reserve Bank and Federal Bank Stock
Reserves on Deposit with the Federal Reserve Bank and Federal Bank Stock
The Bank is required to maintain reserves against customer deposits by keeping balances with the Federal Reserve. The cash balances at the Federal Reserve are classified as cash and cash equivalents. Additionally, as a member of the FHLB and FRB, we are required to hold shares of FHLB and FRB stock under the Bank's borrowing agreement. FHLB and FRB stock are recorded at cost as a component of other assets, and any cash dividends received are recorded as a component of other noninterest income.
The tables below provide information on the required reserve balances at the Federal Reserve, as well as shares held at the FHLB and FRB for the years ended and as of December 31, 2018 and 2017:
 
 
Year ended December 31,
(Dollars in thousands)
 
2018
 
2017
Average required reserve balances at FRB San Francisco
 
$
455,866

 
$
397,235


 
 
December 31,
(Dollars in thousands)
 
2018
 
2017
FHLB stock holdings
 
$
17,250

 
$
18,900

FRB stock holdings
 
41,628

 
41,120