Share-Based Compensation (Tables)

3 Months Ended

Mar. 31, 2019

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 March 31, 2019:

Grant	Shares ('000)	Vesting Schedule	Unearned Compensation ('000)		Remaining Periods (in months)
October 2016	411	3 equal annual installments commencing on October 20, 2017	$	368.9	7
July 2017	6	3 equal annual installments commencing on October 20, 2017	$	9.3	7
October 2017	303	3 equal annual installments commencing on October 20, 2018	$	1,429.2	19
May 2018	68	Shares granted to independent board members that fully vest as of May 16, 2019	$	56.3	1
October 2018	382	3 equal annual installments commencing on October 20, 2019	$	2,208.5	31

Summary of Information about Nonvested Restricted Stock Grants

The following table summarizes information about the non-vested restricted stock grants for the three months ended March 31, 2019 and 2018:

	Three Months Ended March 31,
	2019				2018
	Shares		Weighted- Average Grant-Date Fair Value		Shares		Weighted- Average Grant-Date Fair Value
Nonvested at December 31	761		$	7.56	787		$	6.84
Granted	4		8.00		—		—
Vested	—		—		—		—
Forfeited	(5	)	7.93		(2	)	6.37
Nonvested at March 31	760		$	7.56	785		$	6.84