CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Current assets:
Cash and cash equivalents	$ 391,060	$ 371,791
Restricted cash	6,975	25,953
Trade and other receivables, net	112,853	111,266
Due from affiliates	119,049	132,951
Marine operating supplies	29,337	29,505
Other current assets	14,844	11,836
Total current assets	674,118	683,302
Investments in, at equity, and advances to unconsolidated companies	774	1,039
Properties and equipment, net	1,065,297	1,089,857
Deferred drydocking and survey costs	30,602	22,215
Other assets	38,507	31,326
Total assets	1,809,298	1,827,739
Current liabilities:
Accounts payable	29,739	31,939
Accrued costs and expenses	56,025	61,784
Due to affiliates	40,245	34,972
Current portion of long-term debt	9,957	8,568
Other current liabilities	20,115	21,092
Total current liabilities	156,081	158,355
Long-term debt	427,436	430,436
Other liabilities	98,096	94,025
Contingencies (Note 9)
Equity:
Common stock of $0.001 par value, 125,000,000 shares authorized, 37,381,954 and 36,978,280 shares issued and outstanding at March 31, 2019 and December 31, 2018, respectively	37	37
Additional paid-in capital	1,356,436	1,352,388
Accumulated deficit	(232,514)	(210,783)
Accumulated other comprehensive income	2,194	2,194
Total stockholders’ equity	1,126,153	1,143,836
Noncontrolling interests	1,532	1,087
Total equity	1,127,685	1,144,923
Total liabilities and equity	$ 1,809,298	$ 1,827,739