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Equity-Based Compensation (Summary of Stock Option Transactions) (Details) - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Options (in shares):
Beginning balance (in shares)	247,666	277,224	458,349
Granted (in shares)	0	25,000	0
Exercised (in shares)	(87,907)	(42,058)	(175,125)
Forfeited (in shares)		(12,500)	(6,000)
Ending balance (in shares)	159,759	247,666	277,224
Weighted Average Exercise Price (in dollars per share)
Begininng balance (in dollars per share)	$ 17.01	$ 14.95	$ 16.57
Granted (in dollars per share)		42.35
Exercised (in dollars per share)	15.75	16.02	19.08
Forfeited (in dollars per share)		25.44	18.22
Ending balance (in dollars per share)	$ 17.70	$ 17.01	$ 14.95
Weighted Average Remaining Contractual Life (in years)	6 years 1 month 17 days
Aggregate Intrinsic Value	$ 3,026,930

X

- Definition

The number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan.

+ References

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- Definition

Gross number of share options (or share units) granted during the period.

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Amount by which the current fair value of the underlying stock exceeds the exercise price of options outstanding.

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Number of options outstanding, including both vested and non-vested options.

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A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan.

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Weighted average price at which option holders acquired shares when converting their stock options into shares.

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Weighted average price at which grantees could have acquired the underlying shares with respect to stock options that were terminated.

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Weighted average per share amount at which grantees can acquire shares of common stock by exercise of options.

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Weighted average remaining contractual term for option awards outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Number of share options (or share units) exercised during the current period.

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