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CONSOLIDATED STATEMENTS OF CHANGES IN COMMON SHAREHOLDERS' EQUITY (USD $)
In Thousands, except Share data, unless otherwise specified
Total
GSWC
Common Shares
Common Shares
GSWC
Earnings Reinvested in the Business
Earnings Reinvested in the Business
GSWC
Balances at Dec. 31, 2010 $ 377,541 $ 358,295 $ 227,385 $ 217,149 $ 150,156 $ 141,146
Balances (in shares) at Dec. 31, 2010     37,262,000 142    
Add:            
Net Income 45,859 34,822     45,859 34,822
Issuance of Common Shares 1,658 10,000 1,658 10,000    
Issuance of Common Shares (in shares) 138,868   138,000 4    
Exercise of stock options 2,350   2,350      
Exercise of stock options (in shares) 177,426   178,000      
Tax benefit from employee stock-based awards 336 336 336 336    
Compensation on stock-based awards 1,474 1,353 1,474 1,353    
Dividend equivalent rights on stock-based awards not paid in cash 103 98 103 98    
Deduct:            
Dividends on Common Shares 20,552 20,000     20,552 20,000
Dividend equivalent rights on stock-based awards 103 98     103 98
Balances at Dec. 31, 2011 408,666 384,806 233,306 228,936 175,360 155,870
Balances (in shares) at Dec. 31, 2011     37,578,000 146    
Add:            
Net Income 54,148 39,220     54,148 39,220
Issuance of Common Shares   895   895    
Issuance of Common Shares (in shares) 77,038          
Exercise of stock options 13,295          
Exercise of stock options (in shares) 819,400          
Exercise of stock options and other issuance of Common Shares 13,295   13,295      
Exercise of stock options and other issuance of Common Shares (in shares)     896,000      
Tax benefit from employee stock-based awards 890   890      
Compensation on stock-based awards 1,710 1,536 1,710 1,536    
Dividend equivalent rights on stock-based awards not paid in cash 121 113 121 113    
Deduct:            
Dividends on Common Shares 24,130 10,200     24,130 10,200
Dividend equivalent rights on stock-based awards 121 113     121 113
Balances at Dec. 31, 2012 454,579 416,257 249,322 231,480 205,257 184,777
Balances (in shares) at Dec. 31, 2012     38,474,000 146    
Add:            
Net Income 62,686 48,642     62,686 48,642
Issuance of Common Shares   0        
Issuance of Common Shares (in shares) 114,821          
Exercise of stock options 2,111          
Exercise of stock options (in shares) 131,448          
Exercise of stock options and other issuance of Common Shares 2,111   2,111      
Exercise of stock options and other issuance of Common Shares (in shares)     247,000      
Tax benefit from employee stock-based awards 1,026 943 1,026 943    
Compensation on stock-based awards 1,362 1,171 1,362 1,171    
Dividend equivalent rights on stock-based awards not paid in cash 140 127 140 127    
Deduct:            
Dividends on Common Shares 29,360 29,400     29,360 29,400
Dividend equivalent rights on stock-based awards 140 127     140 127
Balances at Dec. 31, 2013 $ 492,404 $ 437,613 $ 253,961 $ 233,721 $ 238,443 $ 203,892
Balances (in shares) at Dec. 31, 2013     38,721,000 146