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Equity Compensation Plans - Restricted Stock and RSUs (Details) - Restricted Stock and Restricted Stock Units [Member] - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Changes in unvested awards
Nonvested at the beginning of the period (in shares)	555,283
Granted (in shares)	140,944	171,356
Vested (in shares)	(149,952)
Forfeited (in shares)	(13,666)
Nonvested at the end of the period (in shares)	532,609	555,283
Weighted Average Grant Date Fair Value
Nonvested at the beginning of the period (in dollars per share)	$ 12.85
Granted (in dollars per share)	12.18
Vested (in dollars per share)	11.16
Forfeited (in dollars per share)	12.97
Nonvested at the end of the period (in dollars per share)	$ 13.15	$ 12.85
Additional information
Total unrecognized compensation cost of restricted awards	$ 2.1
Expected weighted-average period for recognition of unrecognized compensation	1 year 9 months

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Weighted-average period over which cost not yet recognized is expected to be recognized for award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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