Details of Selected Balance Sheet Accounts (Tables)

12 Months Ended

Dec. 31, 2019

Balance Sheet Related Disclosures [Abstract]

Schedule of Accounts, Notes, Loans and Financing Receivable

Additional information regarding selected balance sheet accounts at December 31, 2019 and 2018 is presented below (in thousands): 

	December 31, 2019			December 31, 2018
Accounts receivable, net:
Trade	$	76,370		$	48,875
Unbilled revenue	23,041			21,169
Other	335			555
Total accounts receivable	99,746			70,599
Allowance for doubtful accounts	(253		)	(376		)
Total accounts receivable, net	$	99,493		$	70,223

Schedule of Inventory, Current

	December 31, 2019		December 31, 2018
Inventories:
Finished goods and purchased products	$	3,982	$	2,461
Work in process	813		945
Raw materials	1,082		907
Total inventories	$	5,877	$	4,313

Property, Plant and Equipment

	Estimated Useful Life  (in years)	December 31, 2019			December 31, 2018
Property, plant and equipment, net:
Land		$	43,147		$	46,805
Accommodations assets	3-15	1,696,425			1,650,758
Buildings and leasehold improvements	7-20	26,108			25,168
Machinery and equipment	4-15	12,060			10,693
Office furniture and equipment	3-7	58,005			54,459
Vehicles	3-5	14,604			14,589
Construction in progress		4,286			7,119
Total property, plant and equipment		1,854,635			1,809,591
Accumulated depreciation		(1,264,326		)	(1,150,686		)
Total property, plant and equipment, net		$	590,309		$	658,905

Schedule of Accrued Liabilities

	December 31, 2019		December 31, 2018
Accrued liabilities:
Accrued compensation	$	17,169	$	13,545
Accrued taxes, other than income taxes	3,152		2,177
Other	1,434		234
Total accrued liabilities	$	21,755	$	15,956