Stock Repurchase Program. We currently have a stock repurchase program, approved by our Board, authorizing us to repurchase our common stock from time-to-time as market and business conditions warrant (the “Stock Repurchase Program”). During the second quarters of 2019 and 2018, we repurchased 0.1 million shares of our common stock for $6.5 million (weighted-average price of $45.39 per share) and 0.1 million shares of our common stock for $5.6 million (weighted-average price of $42.79 per share), respectively, and during the six months ended June 30, 2019 and 2018, we repurchased 0.4 million shares of our common stock for $15.8 million (weighted-average price of $40.31 per share) and 0.3 million shares of our common stock for $11.3 million (weighted-average price of $44.25 per share), respectively, under a SEC Rule 10b5-1 Plan.

As of June 30, 2019, the total remaining number of shares available for repurchase under the Stock Repurchase Program totaled 5.1 million shares.

Stock Repurchases for Tax Withholdings. In addition to the above-mentioned stock repurchases, during the second quarters of 2019 and 2018, we repurchased and then cancelled approximately 4,000 shares of common stock for $0.4 million and approximately 19,000 shares of common stock for $0.8 million, respectively, and during the six months ended June 30, 2019 and 2018, we repurchased and then cancelled approximately 108,000 shares of common stock for $4.5 million and approximately 149,000 shares of common stock for $7.0 million, respectively, in connection with minimum tax withholding requirements resulting from the vesting of restricted common stock under our stock incentive plans.

Cash Dividends. During the second quarter of 2019, the Board approved a quarterly cash dividend of $0.2225 per share of common stock, totaling $7.4 million. During the second quarter of 2018, the Board approved a quarterly cash dividend of $0.21 per share of common stock, totaling $7.1 million. Dividends declared for the six months ended June 30, 2019 and 2018 totaled $14.7 million and $14.2 million, respectively.

Warrants. In 2014, in conjunction with the execution of an amendment to our current agreement with Comcast, we issued stock warrants (the “Warrant Agreement”) for the right to purchase up to approximately 2.9 million shares of our common stock (the “Stock Warrants”) as an additional incentive for Comcast to convert customer accounts onto our Advanced Convergent Platform based on various milestones. The Stock Warrants have a ten-year term and an exercise price of $26.68 per warrant.

Upon vesting, the Stock Warrants were recorded as a client contract incentive asset with the corresponding offset to stockholders’ equity. The client contract incentive asset related to the Stock Warrants was amortized as a reduction in cloud and related solutions revenues over the original term of the Comcast amended agreement. As of June 30, 2019, the client contract incentive asset related to these Stock Warrants was fully amortized. As of December 31, 2018, the client contract incentive asset and accumulated amortization related to these Stock Warrants was $25.1 million and $19.8 million, respectively.

As of June 30, 2019, approximately 1.4 million Stock Warrants remain issued, of which 0.4 million were vested.

Stock-Based Awards. A summary of our unvested restricted common stock activity during the quarter and six months ended June 30, 2019 is as follows (shares in thousands):

	Quarter Ended					Six Months Ended
	June 30, 2019					June 30, 2019
	Shares			Weighted- Average Grant Date Fair Value		Shares			Weighted- Average Grant Date Fair Value
Unvested awards, beginning		1,299		$	42.04		1,145		$	41.64
Awards granted		7			46.12		483			40.85
Awards forfeited/cancelled		(110	)		42.70		(114	)		42.68
Awards vested		(16	)		42.05		(334	)		38.87
Unvested awards, ending		1,180		$	42.00		1,180		$	42.00

Included in the awards granted during 2019 are performance-based awards for 0.1 million restricted common stock shares issued to members of executive management and certain key employees, which vest in the first quarter of 2021 upon meeting certain pre-established financial performance objectives over a two-year performance period. Certain performance-based awards become fully vested upon a change in control, as defined, the subsequent involuntary termination of employment, and death.

The other restricted common stock shares granted during the six months ended June 30, 2019 are primarily time-based awards, which vest annually over four years with no restrictions other than the passage of time. Certain shares of the restricted common stock become fully vested upon a change in control, as defined, the subsequent involuntary termination of employment, and death.

We recorded stock-based compensation expense for the second quarters of 2019 and 2018 of $4.8 million and $5.6 million, respectively, and for the six months ended June 30, 2019 and 2018 of $8.5 million and $10.2 million, respectively.