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Pay vs Performance Disclosure
 12 Months Ended
Dec. 31, 2022
USD ($)
Dec. 31, 2021
USD ($)
Dec. 31, 2020
USD ($)
Pay vs Performance Disclosure [Table]      
Pay vs Performance [Table Text Block]
Pay Versus Performance
YearSummary
Compensation
Table Total for
PEO (1)		Compensation
Actually Paid
to PEO (2)		Average
Summary
Compensation
Table Total for
Non-PEO
NEOs (3)		Average
Compensation
Actually Paid
to Non-PEO
NEOs (4)		Value of Initial Fixed $100
Investment Based On (5):		Net Income
(thousands)		Return on
Invested
Capital
(ROIC) (7)
Total
Shareholder
Return		Peer Group
Total
Shareholder
Return (6)
(a)(b)(c)(d)(e)(f)(g)(h)(i)
2022$4,498,650 $1,837,010 $973,521 $505,284 $91 $128 $82,406 12.71 %
2021$4,015,386 $1,084,292 $958,208 $352,480 $132 $141 $75,629 11.30 %
2020$4,478,318 $7,389,974 $1,333,898 $2,060,202 $143 $112 $64,566 17.59 %
    
Company Selected Measure Name Return on Invested Capital    
Named Executive Officers, Footnote [Text Block] (1)The PEO is Bosway our Chief Executive Officer who has been CEO since 2019.
(3)The non-PEO NEOs as a group included for purposes of calculating the average amounts in each applicable year are as follows:
2022: Murphy, Bolanowski, Watorek, Burns, and Jensen
2021: Murphy, Watorek, Burns, and Jensen
2020: Murphy, Syvrud, Watorek, Heard, and Burns
    
Peer Group Issuers, Footnote [Text Block] (6)The selected peer group is the S&P SmallCap 600 Industrials Index.    
PEO Total Compensation Amount $ 4,498,650 $ 4,015,386 $ 4,478,318
PEO Actually Paid Compensation Amount $ 1,837,010 1,084,292 7,389,974
Adjustment To PEO Compensation, Footnote [Text Block] (2)To calculate Compensation Actually Paid ("CAP") for the PEO, the following adjustments were made to the SCT total in accordance with SEC methodology for determining CAP for each year shown:
Year202220212020
PEOBoswayBoswayBosway
SCT Total Compensation$4,498,650 $4,015,386 $4,478,318 
Less: Stock Award Values Reported in SCT for the Covered Year$(2,887,445)$(2,887,488)$(2,769,105)
Plus: Year-End Fair Value for Stock Awards Granted in the Covered Year$2,102,910 $780,890 $4,173,818 
Change in Fair Value of Outstanding Unvested Stock Awards from Prior Years$(1,638,008)$(777,993)$1,502,807 
Change in Fair Value of Stock Awards from Prior Years that Vested in the Covered Year$(239,097)$(46,503)$4,136 
Compensation Actually Paid$1,837,010 $1,084,292 $7,389,974 
    
Non-PEO NEO Average Total Compensation Amount $ 973,521 958,208 1,333,898
Non-PEO NEO Average Compensation Actually Paid Amount $ 505,284 352,480 2,060,202
Adjustment to Non-PEO NEO Compensation Footnote [Text Block]
(4)To calculate CAP for the Non-PEO NEO, the following adjustments were made to the SCT total in accordance with SEC methodology for determining CAP for each year shown:
Year202220212020
Non-PEO NEOsSee Note 3See Note 3See Note 3
Average SCT Total Compensation$973,521 $958,208 $1,333,898 
Less: Average Stock Award Values Reported in SCT for the Covered Year$(427,869)$(465,253)$(557,480)
Plus: Average Year-End Fair Value for Stock Awards Granted in the Covered Year$303,370 $107,105 $862,274 
Average Change in Fair Value of Outstanding Unvested Stock Awards from Prior Years$(246,093)$(249,179)$317,929 
Average Change in Fair Value of Stock Awards from Prior Years that Vested in the Covered Year$(97,645)$1,599 $103,581 
Average Compensation Actually Paid$505,284 $352,480 $2,060,202 
    
Compensation Actually Paid vs. Total Shareholder Return [Text Block]
rock-20230403_g27.jpg
    
Compensation Actually Paid vs. Net Income [Text Block]
rock-20230403_g28.jpg
    
Compensation Actually Paid vs. Company Selected Measure [Text Block]
rock-20230403_g29.jpg
    
Tabular List [Table Text Block]
Most Important
Performance Measure		Nature
Return on invested capitalFinancial measure
Net salesFinancial measure
Adjusted EPSFinancial measure
Days working capitalFinancial measure
    
Total Shareholder Return Amount $ 91 132 143
Peer Group Total Shareholder Return Amount 128 141 112
Net Income (Loss) $ 82,406 $ 75,629 $ 64,566
Company Selected Measure Amount 0.1271 0.1130 0.1759
PEO Name Bosway    
Additional 402(v) Disclosure [Text Block]
Performance Measures
The items listed below represent the most important performance measures used by the Company in 2022 to determine CAP, as described in greater detail in the "Compensation Philosophy and Pay-for-Performance" in the CD&A section of this Proxy Statement:
Relationship between Pay and Performance
Below are graphs showing the relationships between CAP and the performance measures presented in the table above.
    
Measure [Axis]: 1      
Pay vs Performance Disclosure [Table]      
Non-GAAP Measure Description [Text Block] (5)The comparison of total shareholder returns assumes that $100 was invested on December 31 of the prior year in Gibraltar Industries, Inc. and the S&P SmallCap 600 Industrials Index, and that dividends were reinvested when paid.    
Measure [Axis]: 2      
Pay vs Performance Disclosure [Table]      
Non-GAAP Measure Description [Text Block] (7)The Company-selected measure, which is a measure the Company believes represents the most important financial performance not otherwise presented in the table above that the Company uses to link CAP to the NEOs for fiscal year 2022 to the Company's performance is Return on Invested Capital ("ROIC"), a non-GAAP measure. ROIC is defined as adjusted net income before interest (defined as income from continuing operations, as reported in the Company's audited financial statements plus after tax restructuring charges, senior leadership transition costs, acquisition related items, portfolio management, other special costs or intangible asset impairment charges, if any in applicable year, and tax effected interest expense), divided by average adjusted invested capital (the 13-month average of total stockholders' equity adjusted for special charges plus debt, minus cash for the applicable year). While the Company uses numerous financial measures for purposes of evaluating performance for the Company's compensation programs, the Company has determined that ROIC is the financial performance measure that, in the Company's assessment, represents the most important performance measure (that is not otherwise required to be disclosed in the table) used by the company to link compensation actually paid to the company's NEOs, for the most recently completed fiscal year, to Company performance.    
Measure [Axis]: 3      
Pay vs Performance Disclosure [Table]      
Measure Name Return on invested capital    
Measure [Axis]: 4      
Pay vs Performance Disclosure [Table]      
Measure Name Net sales    
Measure [Axis]: 5      
Pay vs Performance Disclosure [Table]      
Measure Name Adjusted EPS    
Measure [Axis]: 6      
Pay vs Performance Disclosure [Table]      
Measure Name Days working capital    
PEO [Member] | Stock Award Values Reported in SCT for the Covered Year [Member]      
Pay vs Performance Disclosure [Table]      
Adjustment to Compensation Amount $ (2,887,445) $ (2,887,488) $ (2,769,105)
PEO [Member] | Year-End Fair Value for Stock Awards Granted in the Covered Year [Member]      
Pay vs Performance Disclosure [Table]      
Adjustment to Compensation Amount 2,102,910 780,890 4,173,818
PEO [Member] | Change in Fair Value of Outstanding Unvested Stock Awards from Prior Years [Member]      
Pay vs Performance Disclosure [Table]      
Adjustment to Compensation Amount (1,638,008) (777,993) 1,502,807
PEO [Member] | Change in Fair Value of Stock Awards from Prior Years that Vested in the Covered Year [Member]      
Pay vs Performance Disclosure [Table]      
Adjustment to Compensation Amount (239,097) (46,503) 4,136
Non-PEO NEO [Member] | Average Stock Award Values Reported in SCT for the Covered Year [Member]      
Pay vs Performance Disclosure [Table]      
Adjustment to Compensation Amount (427,869) (465,253) (557,480)
Non-PEO NEO [Member] | Average Year-End Fair Value for Stock Awards Granted in the Covered Year [Member]      
Pay vs Performance Disclosure [Table]      
Adjustment to Compensation Amount 303,370 107,105 862,274
Non-PEO NEO [Member] | Average Change in Fair Value of Outstanding Unvested Stock Awards from Prior Years [Member]      
Pay vs Performance Disclosure [Table]      
Adjustment to Compensation Amount (246,093) (249,179) 317,929
Non-PEO NEO [Member] | Average Change in Fair Value of Stock Awards from Prior Years that Vested in the Covered Year [Member]      
Pay vs Performance Disclosure [Table]      
Adjustment to Compensation Amount $ (97,645) $ 1,599 $ 103,581