Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
CURRENT ASSETS:
Cash and cash equivalents	$ 145,459	$ 216,510
Accounts receivable—net	82,953	38,990
Contract revenues in excess of billings	39,844	32,106
Inventories	30,760	34,689
Prepaid expenses	2,017	3,091
Other current assets	26,399	37,307
Total current assets	327,432	362,693
PROPERTY AND EQUIPMENT—Net	455,102	383,042
OPERATING LEASE ASSETS	62,233	65,188
GOODWILL	76,576	76,576
INVENTORIES—Noncurrent	65,049	58,413
OTHER	11,278	12,112
TOTAL	997,670	958,024
LIABILITIES AND EQUITY
Accounts payable	85,566	71,308
Accrued expenses	37,626	52,899
Operating lease liabilities	16,729	19,472
Billings in excess of contract revenues	14,814	32,608
Total current liabilities	154,735	176,287
LONG-TERM DEBT	320,971	323,735
OPERATING LEASE LIABILITIES—Noncurrent	45,986	45,879
DEFERRED INCOME TAXES	68,497	56,466
OTHER	8,484	8,989
Total liabilities	598,673	611,356
COMMITMENTS AND CONTINGENCIES (Note 12)
EQUITY:
Common stock—$.0001 par value; 90,000 authorized, 65,746 and 65,023 shares issued and outstanding at December 31, 2021 and December 31, 2020, respectively.	6	6
Additional paid-in capital	308,482	304,757
Accumulated retained earnings	90,369	40,937
Accumulated other comprehensive income	140	968
Total equity	398,997	346,668
TOTAL	$ 997,670	$ 958,024