Share-Based Compensation (Tables)

6 Months Ended

Jun. 30, 2018

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

Summary of Information about Restricted Stock Grants Outstanding

The following table summarizes information about outstanding restricted stock grants as of June 30, 2018:

Grant	Shares ('000)	Vesting Schedule	Unearned Compensation ('000)		Remaining Periods (in months)
October 2015	596	3 equal annual installments commencing on October 20, 2016	$	179.3	4
January/March 2016	63	3 equal annual installments commencing on October 20, 2016	$	9.0	4
October 2016	411	3 equal annual installments commencing on October 20, 2017	$	872.1	16
July 2017	6	3 equal annual installments commencing on October 20, 2017	$	21.3	16
October 2017	303	3 equal annual installments commencing on October 20, 2018	$	2,221.9	28
October 2017	46	fully vests as of October 20, 2018	$	150.0	4
May 2018	64	fully vests as of May 20, 2019	$	450.0	10

Summary of Information about Nonvested Restricted Stock Grants

The following table summarizes information about the non-vested restricted stock grants for the six months ended June 30, 2018 and 2017:

	Six Months Ended June 30,
	2018				2017
	Shares (000’s)		Weighted- Average Grant-Date Fair Value		Shares (000’s)		Weighted- Average Grant-Date Fair Value
Nonvested at December 31	787		$	6.84	981		$	4.70
Granted	64		8.41		—		—
Vested	—		—		(3	)	4.89
Forfeited	(6	)	6.98		(12	)	5.20
Nonvested at March 31	845		$	6.96	966		$	4.69