Consolidated Statement of Stockholders' Equity - USD ($) shares in Thousands, $ in Thousands	Total	Common Stock	Additional Paid-In Capital	Retained Earnings	Accumulated Other Comprehensive Loss	Treasury Stock
Beginning balance (in shares) at Dec. 31, 2023		34,219
Balance, value at Dec. 31, 2023	$ 914,998	$ 342	$ 332,621	$ 738,511	$ (2,114)	$ (154,362)
Beginning balance (in shares) at Dec. 31, 2023						3,778
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss) income	91,183			91,183
Foreign currency translation adjustment	(679)				(679)
Stock compensation expense	8,686		8,686
Net settlement of restricted stock units (in shares)		72				27
Net settlement of restricted stock units	(1,953)	$ 1	(1)			$ (1,953)
Awards of common stock (in shares)		7
Excise tax on repurchase of common stock	(15)					$ (15)
Common stock repurchased under stock repurchase program (in shares)						(139)
Common stock repurchased under stock repurchase program	(8,987)					$ (8,987)
Ending balance (in shares) at Sep. 30, 2024		34,298
Balance, value at Sep. 30, 2024	1,003,233	$ 343	341,306	829,694	(2,793)	$ (165,317)
Ending balance (in shares) at Sep. 30, 2024						3,944
Beginning balance (in shares) at Jun. 30, 2024		34,274
Balance, value at Jun. 30, 2024	975,671	$ 343	338,978	795,655	(3,496)	$ (155,809)
Beginning balance (in shares) at Jun. 30, 2024						3,797
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss) income	34,039			34,039
Foreign currency translation adjustment	703				703
Stock compensation expense	2,328		2,328
Net settlement of restricted stock units (in shares)		24				8
Net settlement of restricted stock units	(506)	$ 0	0			$ (506)
Excise tax on repurchase of common stock	(15)					$ (15)
Common stock repurchased under stock repurchase program (in shares)						139
Common stock repurchased under stock repurchase program	(8,987)					$ (8,987)
Ending balance (in shares) at Sep. 30, 2024		34,298
Balance, value at Sep. 30, 2024	$ 1,003,233	$ 343	341,306	829,694	(2,793)	$ (165,317)
Ending balance (in shares) at Sep. 30, 2024						3,944
Beginning balance (in shares) at Dec. 31, 2024	34,313	34,313
Balance, value at Dec. 31, 2024	$ 1,048,034	$ 343	343,583	875,851	(5,326)	$ (166,417)
Beginning balance (in shares) at Dec. 31, 2024	3,960					3,960
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss) income	$ (41,939)			(41,939)
Foreign currency translation adjustment	1,546				1,546
Stock compensation expense	8,135		8,135
Net settlement of restricted stock units (in shares)		145				58
Net settlement of restricted stock units	(3,715)	$ 2	(2)			$ (3,715)
Awards of common stock (in shares)		13
Stock options exercised (in shares)		5
Stock options exercised	198		198
Excise tax on repurchase of common stock	(485)					$ (485)
Common stock repurchased under stock repurchase program (in shares)						(915)
Common stock repurchased under stock repurchase program	$ (60,000)					$ (60,000)
Ending balance (in shares) at Sep. 30, 2025	34,313	34,476
Balance, value at Sep. 30, 2025	$ 951,774	$ 345	351,914	833,912	(3,780)	$ (230,617)
Ending balance (in shares) at Sep. 30, 2025	4,933					4,933
Beginning balance (in shares) at Jun. 30, 2025		34,419
Balance, value at Jun. 30, 2025	$ 1,041,180	$ 344	350,259	922,974	(3,015)	$ (229,382)
Beginning balance (in shares) at Jun. 30, 2025						4,913
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss) income	(89,062)			(89,062)
Foreign currency translation adjustment	(765)				(765)
Stock compensation expense	1,458		1,458
Net settlement of restricted stock units (in shares)		52				20
Net settlement of restricted stock units	(1,241)	$ 1	(1)			$ (1,241)
Stock options exercised (in shares)		5
Stock options exercised	198		198
Excise tax on repurchase of common stock	$ 6					6
Ending balance (in shares) at Sep. 30, 2025	34,313	34,476
Balance, value at Sep. 30, 2025	$ 951,774	$ 345	$ 351,914	$ 833,912	$ (3,780)	$ (230,617)
Ending balance (in shares) at Sep. 30, 2025	4,933					4,933

GIBRALTAR INDUSTRIES, INC. 10-Q