Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Current Assets:
Cash and cash equivalents	$ 113,396	$ 96,443
Restricted cash and marketable securities	8,755	7,057
Marine operating supplies	5,165	5,045
Inventories	1,604	1,794
Prepaid expenses and other current assets	21,263	21,351
Total current assets	150,183	131,690
Property and equipment, net	285,979	250,952
Goodwill	22,105	22,105
Intangibles, net	7,975	9,554
Other long-term assets	7,167	10,047
Total assets	473,409	424,348
Current Liabilities:
Contract with Customer, Liability, Current	123,489	112,238
Accounts payable and accrued expenses	33,944	30,422
Long-term debt - current	2,000	1,750
Total current liabilities	159,433	144,410
Long-term debt, less current portion	188,089	164,186
Deferred tax liabilities	2,787	2,444
Other long-term liabilities	554	684
Total liabilities	350,863	311,724
COMMITMENTS AND CONTINGENCIES
REDEEMABLE NONCONTROLLING INTEREST	6,502	6,302
STOCKHOLDERS’ EQUITY
Preferred stock, $0.0001 par value, 1,000,000 shares authorized; no shares issued and outstanding
Common stock, $0.0001 par value, 200,000,000 shares authorized; 45,814,925 and 45,427,030 issued, 45,442,728 and 44,787,608 outstanding as of December 31, 2018 and December 31, 2017, respectively	5	5
Additional paid-in capital	41,539	42,498
Retained earnings	75,171	63,819
Accumulated other comprehensive loss	(671)
Total stockholders' equity	116,044	106,322
Total liabilities, stockholders' equity and redeemable noncontrolling interest	$ 473,409	$ 424,348