Condensed Consolidated Statements of Cash Flows (Unaudited)) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Cash Flows From Operating Activities
Net (loss) income	$ (2,471)	$ 15,079
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	6,690	6,188
Amortization of National Geographic fee	727	727
Amortization of deferred financing costs and other, net	486	434
Amortization of right-to-use lease assets	51	165
Stock-based compensation	898	753
Deferred income taxes	(1,828)	(3,865)
Loss (gain) on foreign currency	3,443	(656)
Changes in operating assets and liabilities
Marine operating supplies and inventories	(239)	(219)
Prepaid expenses and other current assets	2,339	(6,699)
Unearned passenger revenues	4,770	6,016
Other long-term assets	621	(1,294)
Other long-term liabilities	(4,411)	825
Accounts payable and accrued expenses	4,356	(2,112)
Net cash provided by operating activities	15,432	15,342
Cash Flows From Investing Activities
Purchases of property and equipment	(116,732)	(35,144)
Net cash used in investing activities	(116,732)	(35,144)
Cash Flows From Financing Activities
Proceeds from long-term debt	152,695
Repayments of long-term debt	(500)	(500)
Payment of deferred financing costs	(61)	(18)
Repurchase under stock-based compensation plans and related tax impacts	(134)	(1,167)
Repurchase of warrants and common stock	(127)	(23)
Net cash provided by (used in) financing activities	151,873	(1,708)
Net increase (decrease) in cash, cash equivalents and restricted cash	50,573	(21,510)
Cash, cash equivalents and restricted cash at beginning of period	109,258	122,150
Cash, cash equivalents and restricted cash at end of period	159,831	100,640
Supplemental disclosures of cash flow information:
Interest	3,862	3,377
Income taxes	$ 12	$ 23