Adjustments to Additional Paid in Capital, Fair Value of Stock Options Granted

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Share-based Compensation Arrangement by Share-based Payment Award, Terms of Award, Period

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Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.

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-Publisher FASB
-Name Accounting Standards Codification
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Amount of cash inflow from exercise of stock options granted under share-based compensation arrangement.

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Period which an employee's right to exercise an award is no longer contingent on satisfaction of either a service condition, market condition or a performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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

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

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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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Amount of difference between fair value of the underlying shares reserved for issuance and exercise price of vested portions of options outstanding and currently exercisable.

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Weighted average remaining contractual term for vested portions of options outstanding and currently exercisable or convertible, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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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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Stock-Based Compensation (Stock Options Narrative) (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock options outstanding (in shares)	929,000	2,262,000	1,763,000	2,211,000
Granted (in shares)		1,222,000
Weighted average fair value of options granted (in usd per share)		$ 11.78
Adjustments to additional paid-in capital for fair value of options granted		$ 565
Fair value of options exercisable	$ 2,700
Weighted average contractual life of outstanding options (in years)	2 years 3 months
Weighted average contractual life of exercisable options (in years)		3 years 2 months
Parkway Key Executives
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted (in shares)		672,375
Weighted average fair value of options granted (in usd per share)		$ 0.84
Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock options outstanding (in shares)	928,608
Term life of stock options (years)	10 years
Vesting period	4 years
Compensation expense	$ 0	$ 0	$ 15
Cash proceeds from the exercise of stock options	$ 4,500
Stock Options \| Parkway Key Executives
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period		10 years