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CONSOLIDATED STATEMENTS OF CAPITAL STOCK AND LONG-TERM DEBT (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2013
Dec. 31, 2012
Common Stock, No Par Value $ 146,185 $ 143,572
Retained Earnings 42,560 38,060
TOTAL COMMON EQUITY 188,745 181,632
TOTAL PREFERRED STOCK 2,886 3,353
SUBTOTAL LONG-TERM DEBT 133,112 140,361
Add: Premium on Issuance of Long-term Debt 2,072 2,236
Less: Current Portion of Long-term Debt (5,386) (11,130)
TOTAL LONG-TERM DEBT 129,798 131,467
Amortizing Secured Note, due December 20, 2021
    
SUBTOTAL LONG-TERM DEBT 2,005 2,169
Amortizing Secured Note, due May 19, 2028
    
SUBTOTAL LONG-TERM DEBT 6,055 6,475
Amortizing Secured Note, due August 25, 2030
    
SUBTOTAL LONG-TERM DEBT 4,667 4,947
Amortizing Secured Note, due September 19, 2031
    
SUBTOTAL LONG-TERM DEBT 4,947 5,227
State Revolving Trust Note, due December 31, 2022
    
SUBTOTAL LONG-TERM DEBT 465 506
State Revolving Trust Note, due May 1, 2025
    
SUBTOTAL LONG-TERM DEBT 2,654 2,837
State Revolving Trust Note, due January 25, 2027
    
SUBTOTAL LONG-TERM DEBT 569 602
State Revolving Trust Note, due December 1, 2026
    
SUBTOTAL LONG-TERM DEBT 742 784
State Revolving Trust Bond 4.00% to 5.00%, due August 1, 2021
    
SUBTOTAL LONG-TERM DEBT 343 388
State Revolving Trust Bond 0.00%, due August 1, 2021
    
SUBTOTAL LONG-TERM DEBT 281 320
State Revolving Trust Note, due July 1, 2028
    
SUBTOTAL LONG-TERM DEBT 330 347
State Revolving Trust Note, due January 1, 2028
    
SUBTOTAL LONG-TERM DEBT 110 116
State Revolving Trust Note, due August 1, 2031
    
SUBTOTAL LONG-TERM DEBT 467 397
Amortizing Secured Note, due April 20, 2029
    
SUBTOTAL LONG-TERM DEBT 5,348 5,697
Amortizing Secured Note 7.05%, due January 20, 2030
    
SUBTOTAL LONG-TERM DEBT 4,021 4,271
Amortizing Secured Note 5.69%, due January 20, 2030
    
SUBTOTAL LONG-TERM DEBT 8,248 8,761
State Revolving Trust Note, due July 1, 2031
    
SUBTOTAL LONG-TERM DEBT 2,515 2,615
State Revolving Trust Note, due November 30, 2030
    
SUBTOTAL LONG-TERM DEBT 1,333 1,388
First Mortgage Bonds - Series X
    
SUBTOTAL LONG-TERM DEBT 268 322
First Mortgage Bonds - Series Y
    
SUBTOTAL LONG-TERM DEBT 300 355
First Mortgage Bonds - Series Z
    
SUBTOTAL LONG-TERM DEBT 671 782
First Mortgage Bonds - Series AA
    
SUBTOTAL LONG-TERM DEBT 830 955
First Mortgage Bonds - Series BB
    
SUBTOTAL LONG-TERM DEBT 965 1,085
First Mortgage Bonds - Series DD
    
SUBTOTAL LONG-TERM DEBT    6,000
First Mortgage Bonds - Series EE
    
SUBTOTAL LONG-TERM DEBT 3,968 4,386
First Mortgage Bonds - Series GG
    
SUBTOTAL LONG-TERM DEBT 1,171 1,262
First Mortgage Bonds - Series II
    
SUBTOTAL LONG-TERM DEBT 971 1,060
First Mortgage Bonds - Series KK
    
SUBTOTAL LONG-TERM DEBT 1,346 1,435
First Mortgage Bonds - Series MM
    
SUBTOTAL LONG-TERM DEBT 1,637 1,801
First Mortgage Bonds - Series OO
    
SUBTOTAL LONG-TERM DEBT 2,709 2,860
First Mortgage Bonds - Series QQ
    
SUBTOTAL LONG-TERM DEBT 9,915 9,915
First Mortgage Bonds - Series RR
    
SUBTOTAL LONG-TERM DEBT 22,500 22,500
First Mortgage Bonds - Series SS
    
SUBTOTAL LONG-TERM DEBT 23,000 23,000
First Mortgage Bonds - Series TT
    
SUBTOTAL LONG-TERM DEBT 2,860   
First Mortgage Bonds - Series CC
    
SUBTOTAL LONG-TERM DEBT 1,145 1,275
First Mortgage Bonds - Series FF
    
SUBTOTAL LONG-TERM DEBT 5,335 5,755
First Mortgage Bonds - Series HH
    
SUBTOTAL LONG-TERM DEBT 1,475 1,560
First Mortgage Bonds - Series JJ
    
SUBTOTAL LONG-TERM DEBT 1,165 1,235
First Mortgage Bonds - Series LL
    
SUBTOTAL LONG-TERM DEBT 1,505 1,570
First Mortgage Bonds - Series NN
    
SUBTOTAL LONG-TERM DEBT 1,835 1,910
First Mortgage Bonds - Series PP
    
SUBTOTAL LONG-TERM DEBT 885 915
First Mortgage Bonds - Series UU
    
SUBTOTAL LONG-TERM DEBT 1,015   
State Revolving Trust Note, due March 1, 2026
    
SUBTOTAL LONG-TERM DEBT 541 576
Convertible Preferred Stock $7.00 Series
    
TOTAL PREFERRED STOCK 1,457 1,457
Convertible Preferred Stock $8.00 Series
    
TOTAL PREFERRED STOCK 349 816
Nonredeemable Preferred Stock $7.00 Series
    
TOTAL PREFERRED STOCK 80 80
Nonredeemable Preferred Stock $4.75 Series
    
TOTAL PREFERRED STOCK $ 1,000 $ 1,000