Share-Based Compensation - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2019
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Repurchase of common stock for employee tax withholding obligations amount	$ 1,059	$ 2,905
2017 Plan
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Useful Term of the plan	10 years
Common stock shares issuable	1,750,000
Shares available for grant	1,505,330
2007 Plan
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Award vesting period	3 years
2007 Plan | Performance Unit Incentive Plan (“PUP”)
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Shares available for grant	0
Awards with grant date fair value during the period	$ 4,800
Stock value payable	1,800
Liability awards recorded	400		$ 5,300
Payments to employees	$ 2,600		5,600
Paid to employees as shares			$ 3,400
Repurchase of common stock for employee tax withholding obligations amount, shares			25,771
Repurchase of common stock for employee tax withholding obligations amount			$ 1,500
2007 Plan | Restricted Stock
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Repurchase of common stock for employee tax withholding obligations amount, shares	17,674	24,067
Repurchase of common stock for employee tax withholding obligations amount	$ 1,100	$ 1,400
Unamortized cost	$ 4,400
Recognition period of unrecognized cost	1 year 9 months 18 days
2007 Plan | Restricted Stock Units
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Payments to employees	$ 200	$ 300
Liabilities related to restricted stock	$ 100		$ 400