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Other-than-Temporary Impairment (Tables)
 6 Months Ended
Jun. 30, 2019
Other than Temporary Impairment Losses, Investments [Abstract]  
ScheduleofSignifcantinputsinMeasuringOtherthantemporaryimpairmentsrecognizedinearnings [Table Text Block]
 
 
 
 
 
 
 
 
 
Schedule of Roll-Forward Cumulative Credit Losses Recognized
The following table presents a roll-forward of the amount of credit losses on the Bank’s investment securities recognized in earnings during the life of the securities for which a portion of the other-than-temporary loss was previously recognized in accumulated other comprehensive income.
 
For the Three Months Ended June 30,
 
For the Six Months Ended June 30,
 
2019
 
2018
 
2019
 
2018
Balance, beginning of period
$
322

 
$
378

 
$
335

 
$
394

Amount related to credit loss for which an other-than-temporary impairment was previously recognized
2

 
1

 
3

 
1

Increase in cash flows expected to be collected, (accreted as interest income over the remaining lives of the applicable securities)
(12
)
 
(16
)
 
(26
)
 
(32
)
Balance, end of period
$
312

 
$
363

 
$
312

 
$
363