Stock-Based Compensation (Tables)

6 Months Ended

Jun. 30, 2019

Stock-Based Compensation [Abstract]

Disclosure of restricted stock award activity

The following tables summarize our restricted stock award activity for the three and six months ended June 30, 2019 and 2018.

	Three Months Ended June 30, 2019
	Number of Shares of Restricted Stock Awards (in thousands)		Weighted Average Grant Date Fair Value
Unvested at beginning of period	20.0		$	20.82
Granted	75.0		19.32
Vested	(36.5	)	19.32
Forfeited	—		—
Outstanding (unvested) at end of period	58.5		$	19.83

	Three Months Ended June 30, 2018
	Number of Shares of Restricted Stock Awards (in thousands)		Weighted Average Grant Date Fair Value
Unvested at beginning of period	40.2		$	20.79
Granted	5.0		19.03
Vested	(8.7	)	22.44
Forfeited	(1.5	)	17.11
Outstanding (unvested) at end of period	35.0		$	20.29

	Six Months Ended June 30, 2019
	Number of Shares of Restricted Stock Awards (in thousands)		Weighted Average Grant Date Fair Value
Unvested at beginning of period	26.5		$	21.31
Granted	87.5		19.42
Vested	(55.0	)	19.92
Forfeited	(0.5	)	17.11
Outstanding (unvested) at end of period	58.5		$	19.83

	Six Months Ended June 30, 2018
	Number of Shares of Restricted Stock Awards (in thousands)		Weighted Average Grant Date Fair Value
Unvested at beginning of period	53.7		$	21.82
Granted	5.0		19.03
Vested	(22.2	)	23.91
Forfeited	(1.5	)	17.11
Outstanding (unvested) at end of period	35.0		$	20.29