STOCK-BASED PLANS

3 Months Ended

Mar. 31, 2018

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

STOCK-BASED PLANS

STOCK BASED PLANS

The Company's stock based plans are described and informational disclosures are provided in the Notes to the Consolidated Financial Statements included in the Company's Annual Report.

Stock Options

The following table summarizes the Company's stock option plan activity for the three months ended March 31, 2018:

	Stock Options		Weighted Average Exercise Price
Stock Options outstanding at December 31, 2017	783,182		$	90.22
Granted	230,000		124.96
Exercised	(93,766	)	65.90
Forfeited	(23,200	)	117.11
Expired	—		—
Stock Options outstanding at March 31, 2018	896,216		$	100.98

Compensation costs related to stock options were $0.7 million for the three months ended March 31, 2018, of which $0.3 million were capitalized to development projects. Compensation costs related to stock options were $0.8 million for the three months ended March 31, 2017, of which $0.3 million were capitalized to development projects.

Restricted Stock

The following table summarizes restricted stock activity for the three months ended March 31, 2018:

	Restricted Stock		Weighted Average Grant Date Fair Value
Restricted stock outstanding at December 31, 2017	354,519		$	89.00
Granted	130,115		84.37
Vested	—		—
Forfeited	(3,489	)	78.53
Restricted stock outstanding at March 31, 2018	481,145		$	87.83

Compensation costs related to restricted stock awards were $2.0 million for the three months ended March 31, 2018, of which $0.3 million were capitalized to development projects. Compensation costs related to restricted stock awards were $1.4 million for the three months ended March 31, 2017, of which $0.3 million were capitalized to development projects.