Stock Based Compensation Restricted Stock Units Information (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Weighted Average Grant Date Fair Value
Amount Expensed During the Year	$ 420	$ 391	$ 356
Restricted Stock Units (RSUs)
Restricted Stock Units
Beginning balance, nonvested (in shares)	7,721	3,582	0
Granted (in shares)	3,942	4,139	3,582
Vested (in shares)	0	0	0
Canceled (in shares)	0	0	0
Ending balance, nonvested (in shares)	11,663	7,721	3,582
Weighted Average Grant Date Fair Value
Beginning balance, nonvested (in dollars per share)	$ 30.27	$ 30.70	$ 0
Granted (in dollars per share)	34.25	29.89	30.70
Vested (in dollars per share)	0	0	0
Canceled (in dollars per share)	0	0	0
Ending balance, nonvested (in dollars per share)	$ 31.62	$ 30.27	$ 30.70
Amount Expensed During the Year	$ 119	$ 75	$ 34
Compensation Costs for Non-vested Awards Not Yet Recognized	$ 141	$ 126	$ 76

Amount of expense for award under share-based payment arrangement. Excludes amount capitalized.

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The number of equity-based payment instruments, excluding stock (or unit) options, that were forfeited during the reporting period.

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