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

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Stock-Based Compensation - Narrative (Details) - USD ($) $ in Thousands		3 Months Ended		23 Months Ended
	May 29, 2018	Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2020
Share-based Compensation Arrangement by Share-based Payment Award
Stock-based compensation		$ 680	$ 855
Expected cost on shares expected to vest		$ 5,893		$ 5,893
Recognition period for compensation expense not yet recognized		4 years
Restricted Stock \| Vesting Period 2
Share-based Compensation Arrangement by Share-based Payment Award
Vesting period		3 years
Restricted Stock \| Vesting Period 2 \| Minimum
Share-based Compensation Arrangement by Share-based Payment Award
Vesting period				1 year
Performance Share Units
Share-based Compensation Arrangement by Share-based Payment Award
Vesting period	3 years