Stockholders' Equity - Additional Information (Details) $ / shares in Units, € in Millions, £ in Millions													1 Months Ended		12 Months Ended
	Dec. 23, 2021 shares	Sep. 18, 2020 shares	Sep. 01, 2020 shares	Mar. 20, 2020 shares	Jun. 14, 2019 shares	Jun. 08, 2019 shares	May 28, 2019 shares	Mar. 15, 2019 USD ($) shares	Mar. 15, 2019 EUR (€) shares	Jan. 25, 2019 USD ($)	Jan. 25, 2019 GBP (£)	Jan. 09, 2019 USD ($) Vessel shares	Dec. 31, 2021 USD ($) $ / shares shares	Apr. 30, 2018 shares	Dec. 31, 2021 USD ($) $ / shares shares		Dec. 31, 2020 USD ($) $ / shares shares		Dec. 31, 2019 shares	Jun. 09, 2020 shares	Jan. 01, 2019 USD ($)	Dec. 31, 2018 USD ($)
Class Of Stock [Line Items]
Common stock, par value (in dollars per share) | $ / shares													$ 0.01		$ 0.01		$ 0.01
Class of warrant or right, exercised during period	48,809	83,367	255,307		64,440	64,440	380,000
Class of warrant or right, outstanding													1,439,483		1,439,483		1,488,292		1,826,966
Number of shares withheld in an exercise to purchase warrants as payment for the exercise	149	354			49
Acquired															1	[1]	4	[2]	4
Common stock value | $													$ 262,000		$ 262,000		$ 235,000
Cumulative Effect of New Accounting Principle in Period of Adoption | $													446,541,000		446,541,000		401,836,000					$ 565,351,000
Retained Earnings [Member]
Class Of Stock [Line Items]
Cumulative Effect of New Accounting Principle in Period of Adoption | $													$ (22,907,000)		$ (22,907,000)		$ (51,839,000)					$ 137,250,000
Retained Earnings [Member] | Accounting Standards Update 2016-02 | Cumulative Effect, Period of Adoption, Adjustment
Class Of Stock [Line Items]
Cumulative Effect of New Accounting Principle in Period of Adoption | $																					$ 10,400,000
Private Placement
Class Of Stock [Line Items]
Stock Issued During Period, Shares, New Issues												603,872		750,000
Acquired | Vessel												3
Common stock value | $												$ 7,800
Falcon Global Holdings
Class Of Stock [Line Items]
Ownership percentage by parent				28.00%
2017 Equity Incentive Plan
Class Of Stock [Line Items]
Common shares registered for issuance													2,174,000		2,174,000
Common shares remaining available for issuance																				24,821
2020 Equity Incentive Plan
Class Of Stock [Line Items]
Common shares registered for issuance																				2,114,821
Common shares authorized for issuance																				2,080,000
Common shares remaining available for issuance													843,031		843,031
Exchange Warrants
Class Of Stock [Line Items]
Class of warrant or right, outstanding													1,439,483		1,439,483		1,488,292
Number of shares withheld in an exercise to purchase warrants as payment for the exercise	149	354			49
Merger Agreement | Common Stock [Member] | Merger Consideration
Class Of Stock [Line Items]
Common stock issued													1,567,935
Falcon Global Holdings
Class Of Stock [Line Items]
Common stock issued				900,000
Business acquisition, percentage of voting interests acquired				100.00%
Windcat Workboats Facilities | Seabulk Overseas
Class Of Stock [Line Items]
Common stock issued								50,000	50,000
Business acquisition, percentage of voting interests acquired								6.25%	6.25%	6.25%	6.25%		100.00%		100.00%
Business combination, consideration transferred, total								$ 1,400,000	€ 1.2	$ 2,000,000.0	£ 1.6
OSV Partners | Merger Agreement | Common Stock [Member] | Limited Partner
Class Of Stock [Line Items]
Common stock issued															1,567,935
OSV Partners | Merger Agreement | Common Stock [Member] | Merger Consideration
Class Of Stock [Line Items]
Common stock issued													531,872		1,567,935
OSV Partners | Merger Agreement | Common Stock [Member] | PIK Loan Consideration | Limited Partner
Class Of Stock [Line Items]
Common stock issued													1,036,063
OSV Partners I | Merger Agreement | Common Stock [Member] | Merger Consideration
Class Of Stock [Line Items]
Common stock issued															531,872
OSV Partners I | Merger Agreement | Common Stock [Member] | PIK Loan Consideration | Limited Partner
Class Of Stock [Line Items]
Common stock issued															1,036,063

[1] Excludes five PSVs acquired as part of the OSV Partners Acquisition (see “Note 3. Business Acquisitions”).

[2] Excludes three CTVs as assets held for sale and seven PSVs acquired as part of the SEACOSCO Acquisition (see “Note 3. Business Acquisitions”).