Condensed Consolidated Statements of Cash Flows (Unaduited) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
Cash Flows From Operating Activities
Net income	$ 15,930	$ 10,760
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	12,370	10,038
Amortization of National Geographic fee	1,454	1,454
Amortization of deferred financing costs and other, net	911	1,045
Stock-based compensation	1,754	1,985
Deferred income taxes	(4,106)	152
(Gain) loss on foreign currency	(1,157)	1,592
Write-off of unamortized issuance costs related to debt refinancing		359
Loss on write-off of assets		129
Changes in operating assets and liabilities
Marine operating supplies and inventories	(32)	(39)
Prepaid expenses and other current assets	(10,033)	(7,048)
Right-to-use lease assets	(5,808)
Lease liabilities	5,993
Unearned passenger revenues	21,600	9,915
Other long-term assets	(767)	(1,120)
Other long-term liabilities	706	15
Accounts payable and accrued expenses	(1,587)	(4,457)
Net cash provided by operating activities	37,228	24,780
Cash Flows From Investing Activities
Purchases of property and equipment	(42,311)	(31,502)
Net cash used in investing activities	(42,311)	(31,502)
Cash Flows From Financing Activities
Proceeds from long-term debt		200,000
Repayments of long-term debt	(1,000)	(170,625)
Payment of deferred financing costs	(2,340)	(6,486)
Repurchase under stock-based compensation plans and related tax impacts	(1,653)	(4,457)
Repurchase of warrants and common stock	(23)	(854)
Net cash (used in) provided by financing activities	(5,016)	17,578
Effect of exchange rate changes on cash		8
Net (decrease) increase in cash, cash equivalents and restricted cash	(10,099)	10,864
Cash, cash equivalents and restricted cash at beginning of period	122,150	103,500
Cash, cash equivalents and restricted cash at end of period	112,051	114,364
Supplemental disclosures of cash flow information:
Interest	6,999	6,534
Income taxes	564	776
Non-cash investing and financing activities:
Additional paid-in capital exercise proceeds of option shares	225	1,682
Additional paid-in capital exchange proceeds used for option shares	$ (225)	$ (1,682)