Debt (Tables)

12 Months Ended

Dec. 31, 2018

Debt Instruments [Abstract]

Schedule of Annual Principal Payments on Long-Term Debt

Annual principal payments on long-term debt at December 31, 2018, are as follows (in thousands):

Years Ending December 31,	Amount
2019	—
2020	—
2021	50,000
2022	75,000
2023	75,000
Thereafter	401,777
	$	601,777