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Stock-based Compensation (Tables)

6 Months Ended

Jun. 30, 2020

Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]

Stock Option Activity

Stock option activity from January 1, 2020 to June 30, 2020 follows:

					Weighted
					Average
	Underlying				Exercise Price
	Shares				Per Share
Outstanding at January 1, 2020		4,766,150			$	20.62
Exercised		—			$	—
Expired		(710,000	)		$	14.83
Outstanding at June 30, 2020		4,056,150			$	21.63
Exercisable at June 30, 2020		4,026,150			$	21.65

Restricted Stock Activity

Restricted stock activity from January 1, 2020 to June 30, 2020 follows:

					Weighted
					Average Grant
					Date Fair Value
	Shares				Per Share
Non-vested restricted stock outstanding at January 1, 2020		72,051			$	21.59
Vested		(72,051	)		$	21.59
Forfeited		—			$	—
Non-vested restricted stock outstanding at June 30, 2020		—			$	—

Restricted Stock Unit Activity

Restricted stock unit activity from January 1, 2020 to June 30, 2020 follows:

									Weighted
									Average Grant
	Time				Performance				Date Fair Value
	Based				Based				Per Share
Non-vested restricted stock units outstanding at January 1, 2020		2,631,726				397,315			$	15.81
Granted		1,691,246				—			$	4.25
Vested		(864,013	)			—			$	15.05
Forfeited		(248,276	)			—			$	14.07
Non-vested restricted stock units outstanding at June 30, 2020		3,210,683				397,315			$	10.69

Performance Units

The total target number of shares with respect to the Performance Units for the awards granted in 2016-2020 is set forth below:

	2020				2019				2018				2017				2016
	Performance				Performance				Performance				Performance				Performance
	Unit Awards				Unit Awards				Unit Awards				Unit Awards				Unit Awards
Target number of shares		500,500				489,800				310,700				186,198				185,000

Fair Value of Performance Units

The fair value of the Performance Units is set forth below (in thousands):

	2020				2019				2018				2017				2016
	Performance				Performance				Performance				Performance				Performance
	Unit Awards				Unit Awards				Unit Awards				Unit Awards				Unit Awards
Fair value at date of grant	$	826			$	9,958			$	8,004			$	5,780			$	3,854

Compensation Expense Associated with Performance Units

Compensation expense associated with the Performance Units is shown below (in thousands):

	2020				2019				2018				2017				2016
	Performance				Performance				Performance				Performance				Performance
	Unit Awards				Unit Awards				Unit Awards				Unit Awards				Unit Awards
Three months ended June 30, 2020	$	69			$	830			$	667			$	161			$	—
Three months ended June 30, 2019	$	—			$	830			$	667			$	482			$	—
Six months ended June 30, 2020	$	69			$	1,660			$	1,334			$	642			$	—
Six months ended June 30, 2019	$	—			$	830			$	1,334			$	963			$	321

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Share based compensation arrangement by share based payment award fair value.

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Tabular disclosure of the changes in outstanding nonvested restricted stock shares.

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