The P. H. Glatfelter Amended and Restated Long-Term Incentive Plan (the “LTIP”) provides for the issuance of Glatfelter common stock to eligible participants in the form of restricted stock units, restricted stock awards, non-qualified stock options, performance shares, incentive stock options and performance units.

Pursuant to terms of the LTIP, we have issued to eligible participants restricted stock units (“RSUs”), performance share awards (“PSAs”) and stock only stock appreciation rights.

Awards of RSUs and PSAs are made under our LTIP. The vesting of RSUs is generally based on the passage of time, generally over a one-year or three-year period or in one instance the RSUs were issued with three-year cliff vesting. PSAs are issued to members of management and vesting is based on achievement of cumulative financial performance targets covering a two-year period followed by an additional one-year service period. The performance measures include a minimum, target and maximum performance level providing the grantees an opportunity to receive more or less shares than targeted depending on actual financial performance. In addition, PSA awards include a modifier based on the three-year total shareholder return relative to a broad market index. For RSUs the grant date fair value of the awards, or the closing price per common share on the date of the award, is used to determine the amount of expense to be recognized over the applicable service period. For PSAs, the grant date fair value is estimated using a lattice model. The significant inputs include the stock price, volatility, dividend yield, and risk-free rate of return. Settlement of RSUs and PSAs will be made in shares of our common stock currently held in treasury.

Units	2020			2019
Balance at January 1,		896,463			756,786
Granted		386,995			484,108
Forfeited		(87,523	)		(158,767	)
Shares delivered		(136,182	)		(163,078	)
Balance at September 30,		1,059,753			919,049

The amount granted in 2020 and 2019 includes 171,150 and 218,422, respectively, of PSAs exclusive of reinvested dividends.

The following table sets forth aggregate RSU and PSA compensation expense included in continuing operations for the periods indicated:

	September 30
In thousands	2020		2019
Three months ended	$	1,617	$	1,048
Nine months ended		3,994		2,643

Stock Only Stock Appreciation Rights (“SOSARs”) Under terms of the SOSAR, a recipient receives the right to a payment in the form of shares of common stock equal to the difference, if any, in the fair market value of one share of common stock at the time of exercising the SOSAR and the exercise price. The SOSARs vest ratably over a three-year period and have a term of ten years. No SOSARs were awarded since 2016.

	2020					2019
SOSARS	Shares			Wtd Avg Exercise Price		Shares			Wtd Avg Exercise Price
Outstanding at January 1,		1,291,947		$	20.05		2,334,742		$	18.08
Granted		—			—		—			—
Exercised		(58,460	)		12.85		(441,920	)		14.31
Canceled / forfeited		(151,074	)		20.25		(446,435	)		21.06
Outstanding at September 30,		1,082,413		$	20.40		1,446,387		$	19.31

The following table sets forth SOSAR compensation expense included in continuing operations for the periods indicated:

	September 30
In thousands	2020		2019
Three months ended	$	—	$	—
Nine months ended		—		40