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Share-Based Payment Awards - Schedule of Stock Option Activity (Details) - Stock Options - 2012 Plan	12 Months Ended
	Dec. 31, 2020 USD ($) $ / shares shares
2012 Plan Stock Options
Outstanding, beginning balance (in shares) | shares	352,200
Exercised (in shares) | shares	(254,300)
Cancelled (in shares) | shares	0
Outstanding, ending balance (in shares) | shares	97,900
Vested or expected to vest (in shares) | shares	97,900
Exercisable (in shares) | shares	97,900
Weighted- Average Exercise Price
Outstanding, beginning balance (in dollars per share) | $ / shares	$ 13.95
Exercised (in dollars per share) | $ / shares	13.62
Cancelled (in dollars per share) | $ / shares	0
Outstanding, ending balance (in dollars per share) | $ / shares	14.80
Vested or expected to vest (in dollars per share) | $ / shares	14.80
Exercisable (in dollars per share) | $ / shares	$ 14.80
Weighted- Average Contractual Life
Weighted Average Contractual Life, Outstanding	1 year
Weighted Average Contractual Life, Vested or expected to vest (in years)	1 year
Weighted Average Contractual Life, Exercisable	1 year
Aggregate Intrinsic Value
Aggregate Intrinsic Value, Outstanding | $	$ 221,700
Aggregate Intrinsic Value, Vested or expected to vest | $	221,700
Aggregate Intrinsic Value, Exercisable | $	$ 221,700

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