Equity-Based Compensation (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
Mar. 31, 2020	Mar. 31, 2019
Employee stock-based compensation expense
Equity-based compensation capitalized (a)	$ (32)	$ (60)
Equity-based compensation expense	2,186	4,051
Time-based awards
Employee stock-based compensation expense
Equity-based compensation expense	$ 2,137	2,112
Restricted Stock Units
Nonvested at beginning of period	455,452
Granted	295,437
Shares vested	(163,028)
Forfeited	(2,711)
Nonvested at end of period	585,150
Nonvested at beginning of period, Weighted average grant date fair value per share	$ 46.15
Granted, Weighted average grant date fair value per share	29.16
Shares vested, Weighted average grant date fair value per share	45.58
Forfeited, Weighted average grant date fair value per share	42.08
Nonvested at end of period, Weighted average grant date fair value per share	$ 37.75
Unrecognized compensation cost	$ 18,900
Period for recognition of RSU compensation expense	2 years 2 months 12 days
Performance-based awards
Employee stock-based compensation expense
Equity-based compensation expense	$ 81	1,101
Restricted Stock Units
Nonvested at beginning of period	139,964
Granted	203,202
Shares vested	(6,331)
Forfeited	(4,034)
Nonvested at end of period	332,801
Nonvested at beginning of period, Weighted average grant date fair value per share	$ 45.31
Granted, Weighted average grant date fair value per share	28.29
Shares vested, Weighted average grant date fair value per share	38.49
Forfeited, Weighted average grant date fair value per share	43.95
Nonvested at end of period, Weighted average grant date fair value per share	$ 35.07
Unrecognized compensation cost	$ 3,700
Period for recognition of RSU compensation expense	2 years 6 months
Bonus settled in shares
Employee stock-based compensation expense
Equity-based compensation expense	$ 0	$ 898

Amount of expense for award under share-based payment arrangement. Excludes amount capitalized.

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Amount of cost capitalized for award under share-based payment arrangement.

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Amount of cost not yet recognized for nonvested award under share-based payment arrangement.

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Weighted average fair value as of the grant date of equity-based award plans other than stock (unit) option plans that were not exercised or put into effect as a result of the occurrence of a terminating event.

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The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date.

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Per share or unit weighted-average fair value of nonvested award under share-based payment arrangement. Excludes share and unit options.

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Number of shares under non-option equity instrument agreements that were cancelled as a result of occurrence of a terminating event.

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