v2.4.0.6
Supplemental Financial Information (Schedule Of Consolidated Statements Of Comprehensive Income) (Details) (USD $)
In Thousands, unless otherwise specified
3 Months Ended
Mar. 31, 2012
Mar. 31, 2011
Net income $ 1,362 $ 8,409
Other comprehensive income:    
Foreign currency translation adjustment 1,935 2,634
Adjustment to retirement benefit liability, net of tax 2 (31)
Adjustment to post-retirement health care liability, net of tax 16 19
Other comprehensive income 1,953 2,622
Total comprehensive income 3,315 11,031
Gibraltar Industries, Inc. [Member]
   
Net income 1,720 9,027
Other comprehensive income:    
Total comprehensive income 1,720 9,027
Guarantor Subsidiaries [Member]
   
Net income 4,350 11,598
Other comprehensive income:    
Adjustment to retirement benefit liability, net of tax 2 (31)
Adjustment to post-retirement health care liability, net of tax 16 19
Other comprehensive income 18 (12)
Total comprehensive income 4,368 11,586
Non-Guarantor Subsidiaries [Member]
   
Net income 1,095 1,001
Other comprehensive income:    
Foreign currency translation adjustment 1,935 2,634
Other comprehensive income 1,935 2,634
Total comprehensive income 3,030 3,635
Eliminations [Member]
   
Net income (5,803) (13,217)
Other comprehensive income:    
Total comprehensive income $ (5,803) $ (13,217)