Stock-Based Compensation (Tables)

6 Months Ended

Jun. 30, 2017

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, 2017 and 2016.

	Three Months Ended June 30, 2017
	Number of Shares of Restricted Stock Awards (in thousands)		Weighted Average Grant Date Fair Value
Unvested at beginning of period	44.5		$	20.33
Granted	3.0		20.53
Vested	(7.0	)	24.03
Forfeited	—		—
Outstanding (unvested) at end of period	40.5		$	19.69

	Six Months Ended June 30, 2017
	Number of Shares of Restricted Stock Awards (in thousands)		Weighted Average Grant Date Fair Value
Unvested at beginning of period	53.0		$	21.53
Granted	3.0		20.53
Vested	(15.5	)	25.17
Forfeited	—		—
Outstanding (unvested) at end of period	40.5		$	19.69

	Three Months Ended June 30, 2016
	Number of Shares of Restricted Stock Awards (in thousands)		Weighted Average Grant Date Fair Value
Unvested at beginning of period	89.0		$	17.68
Granted	41.0		17.11
Vested	(63.2	)	14.27
Forfeited	—		—
Outstanding (unvested) at end of period	66.8		$	20.55

	Six Months Ended June 30, 2016
	Number of Shares of Restricted Stock Awards (in thousands)		Weighted Average Grant Date Fair Value
Unvested at beginning of period	102.4		$	18.36
Granted	74.0		17.27
Vested	(109.6	)	16.06
Forfeited	—		—
Outstanding (unvested) at end of period	66.8		$	20.55