Share-Based Compensation (Tables)

6 Months Ended

Jun. 30, 2019

Share-based Payment Arrangement [Abstract]

Summary of Information about Restricted Stock Grants Outstanding

The following table summarizes information about outstanding restricted stock grants as of June 30, 2019:

Grant	Shares ('000)	Vesting Schedule	Unearned Compensation		Remaining Periods (in months)
October 2016	411	3 equal annual installments commencing on October 20, 2017	$	205.1	4
July 2017	6	3 equal annual installments commencing on October 20, 2017	$	5.3	4
October 2017	303	3 equal annual installments commencing on October 20, 2018	$	1,177.5	16
October 2018	382	3 equal annual installments commencing on October 20, 2019	$	1,948.8	28
May 2019	71	Shares granted to independent board members that fully vest as of May 16, 2020	$	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, 2019 and 2018:

	Six months ended June 30,
	2019				2018
	Shares ('000s)		Weighted- Average Grant-Date Fair Value		Shares ('000s)		Weighted- Average Grant-Date Fair Value
Nonvested at December 31	761		$	7.56	787		$	6.84
Granted	75		7.60		64		8.41
Vested	(68	)	8.38		—		—
Forfeited	(20	)	7.48		(6	)	6.98
Nonvested at June 30	748		$	7.49	845		$	6.96