Condensed Consolidated Statements of Cash Flows (Unaudited)) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019
Cash Flows From Operating Activities
Net (loss) income	$ (42,394)	$ 15,930
Adjustments to reconcile net (loss) income to net cash (used by) provided by operating activities:
Depreciation and amortization	15,243	12,370
Amortization of National Geographic fee	727	1,454
Amortization of deferred financing costs and other, net	972	911
Amortization of right-to-use lease assets	101	185
Stock-based compensation	1,601	1,754
Deferred income taxes	(4,817)	(4,106)
Loss (gain) on foreign currency	7,322	(1,157)
Changes in operating assets and liabilities
Marine operating supplies and inventories	(257)	(32)
Prepaid expenses and other current assets	5,342	(10,033)
Unearned passenger revenues	(18,037)	21,600
Other long-term assets	277	(767)
Other long-term liabilities	(730)	706
Accounts payable and accrued expenses	(2,112)	(1,587)
Net cash (used in) provided by operating activities	(36,762)	37,228
Cash Flows From Investing Activities
Purchases of property and equipment	(152,031)	(42,311)
Net cash used in investing activities	(152,031)	(42,311)
Cash Flows From Financing Activities
Proceeds from long-term debt	183,339	0
Repayments of long-term debt	(1,000)	(1,000)
Payment of deferred financing costs	(96)	(2,340)
Repurchase under stock-based compensation plans and related tax impacts	(351)	(1,653)
Repurchase of warrants and common stock	(127)	(23)
Net cash provided by (used in) financing activities	181,765	(5,016)
Net decrease in cash, cash equivalents and restricted cash	(7,028)	(10,099)
Cash, cash equivalents and restricted cash at beginning of period	109,258	122,150
Cash, cash equivalents and restricted cash at end of period	102,230	112,051
Supplemental disclosures of cash flow information:
Interest	7,971	6,999
Income taxes	60	564
Non-cash investing and financing activities:
Additional paid-in capital exercise proceeds of option shares	0	225
Additional paid-in capital exchange proceeds used for option shares	$ 0	$ (225)