CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Current assets:
Cash and cash equivalents	$ 371,791	$ 432,035
Restricted cash	25,953	21,300
Trade and other receivables, less allowance for doubtful accounts of $2,700 and $1,800 as of December 31, 2018 and December 31, 2017, respectively	111,266	114,184
Due from affiliate	132,951	230,315
Marine operating supplies	29,505	28,220
Other current assets	11,836	19,130
Total current assets	683,302	845,184
Investments in, at equity, and advances to unconsolidated companies	1,039	29,216
Net properties and equipment	1,089,857	850,935
Deferred drydocking and survey costs	22,215	3,208
Other assets	31,326	31,052
Total assets	1,827,739	1,759,595
Current liabilities:
Accounts payable	31,939	38,497
Accrued expenses	61,784	54,806
Due to affiliate	34,972	99,448
Accrued property and liability losses	2,726	2,585
Current portion of long-term debt	8,568	5,103
Other current liabilities	18,366	19,693
Total current liabilities	158,355	220,132
Long-term debt	430,436	443,057
Accrued property and liability losses	4,123	2,471
Other liabilities and deferred credits	89,902	71,991
Commitments and contingencies (Note 15)
Equity:
Common stock of $0.001 par value, 125,000,000 shares authorized, 36,978,280 and 22,115,916 shares issued and outstanding at December 31, 2018 and December 31, 2017, respectively	37	22
Additional paid-in capital	1,352,388	1,059,120
Accumulated deficit	(210,783)	(39,266)
Accumulated other comprehensive income (loss)	2,194	(147)
Total stockholders’ equity	1,143,836	1,019,729
Noncontrolling interests	1,087	2,215
Total equity	1,144,923	1,021,944
Total liabilities and equity	$ 1,827,739	$ 1,759,595