Intangible Assets (Tables)

12 Months Ended

Dec. 31, 2020

Intangible Assets, Net (Excluding Goodwill) [Abstract]

Schedule of Intangible Assets

The following is a summary of our intangible assets as of December 31, 2020 (in thousands, except weighted average amortization period), with Silversea Cruises' trade name representing approximately $318.7 million of the indefinite-lived intangible asset balance:

	As of December 31, 2020
	Remaining Weighted Average Amortization Period (Years)	Gross Carrying Value		Accumulated Amortization		Accumulated Impairment Losses		Net Carrying Value
Finite-life intangible assets:
Customer relationships	12.8	$	97,400	$	14,069	$	—	$	83,331
Galapagos operating license	23.8	47,669		7,621		—		40,048
Other finite-life intangible assets	0	11,560		11,560		—		—
Total finite-life intangible assets		156,629		33,250		—		123,379
Indefinite-life intangible assets (1)		352,275		—		30,800		321,475
Total intangible assets, net		$	508,904	$	33,250	$	30,800	$	444,854

(1) Primarily relates to the Silversea Cruises trade name.

The following is a summary of our intangible assets as of December 31, 2019 (in thousands, except weighted average amortization period):

	As of December 31, 2019
	Remaining Weighted Average Amortization Period (Years)	Gross Carrying Value		Accumulated Amortization		Net Carrying Value
Finite-life intangible assets:
Customer relationships	13.8	$	97,400	$	7,576	$	89,824
Galapagos operating license	24.7	47,669		6,010		41,659
Other finite-life intangible assets	0.8	11,560		6,743		4,817
Total finite-life intangible assets		156,629		20,329		136,300
Indefinite-life intangible assets (1)		352,275		—		352,275
Total intangible assets, net		$	508,904	$	20,329	$	488,575

(1) Primarily relates to the Silversea Cruises trade name.

Schedule of Future Amortization Expense

The estimated future amortization for finite-life intangible assets for each of the next five years is as follows (in thousands):

Year
2021	$	8,179
2022	$	8,179
2023	$	8,179
2024	$	8,179
2025	$	8,179