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Stock-based Compensation - Phantom Stock Plan (Details) - Phantom Share Units (PSUs) [Member] - Phantom Stock Plan [Member]
 6 Months Ended
Jun. 30, 2021
$ / shares
shares
Outstanding, beginning balance (in shares) | shares 120,248
Outstanding, beginning balance (in dollars per share) | $ / shares $ 16.64
Granted (in shares) | shares 9,042
Granted (in dollars per share) | $ / shares $ 19.52
Forfeited (in shares) | shares (11)
Forfeited (in dollars per share) | $ / shares $ 18.25
Distributions (in shares) | shares (1,483)
Distributions (in dollars per share) | $ / shares $ 17.15
Outstanding, ending balance (in shares) | shares 127,796
Outstanding, ending (in dollars per share) | $ / shares $ 21.43
Vested at June 30, 2021 (in shares) | shares 127,685
Vested at June 30, 2021 (in dollars per share) | $ / shares $ 21.43