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Share-Based Compensation (Tables)

12 Months Ended

Dec. 31, 2017

Share Based Compensation Arrangement By Share Based Payment Award [Line Items]

Summary of Stock Compensation Expense

The following table summarizes stock option compensation expense for the years ended December 31, 2017 and 2016:

		Years Ended December 31,
		2017				2016
Total share-based compensation - stock options		$	1,294			$	899
Income tax benefit			521				360
Unrecognized compensation expense			729				1,752
Weighted-average amortization period remaining		1.2 years				1.8 years

Restricted Shares

Share Based Compensation Arrangement By Share Based Payment Award [Line Items]

Summary of Stock Compensation Expense

The following table summarizes restricted stock compensation expense for the year ended December 31, 2017:

		Year Ended December 31
		2017
Total share-based compensation - restricted stock		$	203
Income tax benefit			83
Unrecognized compensation expense			1,227
Weighted-average amortization period remaining		2.8 years

Omnibus Plan

Share Based Compensation Arrangement By Share Based Payment Award [Line Items]

Summary of Changes in Restricted Shares

The following table discloses the changes in restricted shares for the year ended December 31, 2017:

		Omnibus Plan
		Number of Shares				Weighted Average Grant Date Fair Value
Beginning balance			—			$	—
Granted			70,798				20.31
Vested			—				—
Forfeited			(400	)			20.18
Ending balance outstanding at December 31, 2017			70,398			$	20.31

BYB Plan

Share Based Compensation Arrangement By Share Based Payment Award [Line Items]

Fair Value Assumptions of Stock Options

The fair values of the stock options were determined using the Black-Scholes-Merton model for Time Options and a Monte Carlo simulation model for Performance Options. The fair values of options under the BYB Plan were determined using the following assumptions as of the grant dates:

		Time Options Grants
		2016				2015
Risk-free interest rate		1.34% - 1.40%				1.68% - 1.85%
Expected term (years)		5.2 - 5.6				5.7 - 6.3
Expected stock price volatility			20.39	%		16.18% - 16.55%
Expected dividend yield			0.00	%			0.00	%
Weighted average grant date fair value		$	3.55			$	2.25

		Performance Options Grants
		2016				2015
Risk-free interest rate		Implied forward rates				Implied forward rates
Expected term (years)		Variable				Variable
Expected stock price volatility		20.34% - 20.39%				16.18% - 16.55%
Expected dividend yield			0.00	%			0.00	%
Weighted average grant date fair value		$	3.75			$	1.65

Summary of Activity in shares Subjected to Options and Weighted Average Exercise Prices

The following table discloses the activity in shares subject to options and the weighted average exercise prices, in actual dollars, for the year ended December 31, 2017:

		BYB Plan
		Number of Shares				Weighted Average Exercise Price				Intrinsic Value				Weighted Average Remaining Contractual Term (in Years)
Beginning balance			1,798,220			$	11.95			$	15,788				8.6
Granted			—
Expired			—
Exercised			—
Forfeited			(15,200	)		16.25
Ending balance outstanding at December 31, 2017			1,783,020			$	11.91			$	19,718				7.6
Exercisable at December 31, 2017			1,304,257			$	11.51			$	14,953				7.5

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Tabular disclosure of the allocation of equity-based compensation costs to a given line item on the balance sheet and income statement for the period. This may include the reporting line for the costs and the amount capitalized and expensed.

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