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Stock Compensation (Tables)
 12 Months Ended
Dec. 31, 2021
Share-based Payment Arrangement [Abstract]  
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions The assumptions used for grants in the year ended December 31, 2019 were as follows:
2019
Risk-free interest rate
2.5% - 2.7%
Expected volatility
20.24% - 20.45%
Dividend yield0.0 %
Expected holding period
4 - 10 years
Weighted-average grant date fair value (1)
$2.36 - $4.08
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(1)Per share amounts have not been adjusted to give effect to the stock dividend in 2019.
Schedule of Share-based Compensation, Stock Options, Activity
A summary of employee stock option transactions follows:
Number of
Shares		Weighted-Average
Exercise Price		Weighted-Average
Remaining
Contractual Term
(Years)		Aggregate
Intrinsic
Value(1)
Outstanding on January 1, 20195,860,833 $13.16 4.1$1,095 
Granted406,875 $10.92   
Exercised(1,824,351)$8.67   
Canceled(11)$—   
Outstanding on December 31, 20194,443,346 $14.80 5.0$4,427 
Exercised(620,527)$11.14   
Outstanding on December 31, 20203,822,819 $15.40 4.6$487 
Exercised— $—   
Outstanding on December 31, 20213,822,819 $15.40 3.6$238 
Options exercisable at:    
December 31, 20192,689,673    
December 31, 20202,540,150    
December 31, 20212,988,727    
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(1)The aggregate intrinsic value represents the amount by which the fair value of the underlying common stock ($11.48, $11.65 and $13.39 at December 31, 2021, 2020 and 2019, respectively) exceeds the option exercise price.
Schedule of Share-based Compensation, Shares Authorized under Stock Option Plans, by Exercise Price Range
Additional information relating to options outstanding at December 31, 2021 follows:
 Options OutstandingOptions Exercisable
Range of Exercise PricesOutstanding
as of		Weighted-Average
Remaining
Contractual Life
(Years)		Weighted-Average
Exercise Price		Exercisable
as of		Weighted-Average
Remaining
Contractual Life
(Years)		Weighted-Average
Exercise Price		Aggregate Intrinsic Value
12/31/202112/31/2021
$9.86-$11.831,462,190 2.8$11.32 1,055,315 1.2$11.47 $— 
$11.83-$13.80— — $— — — $— — 
$13.80-$15.77519,278 2.4$14.68 519,278 2.4$14.68 — 
$15.77-$17.74— — $— — — $— — 
$17.74-$19.711,841,351 4.6$18.84 1,414,134 4.1$18.96 — 
 3,822,819 3.6$15.40 2,988,727 2.8$15.57 $238