Annual report pursuant to Section 13 and 15(d)

QUARTERLY FINANCIAL INFORMATION (UNAUDITED) (Details)

v2.4.0.8
QUARTERLY FINANCIAL INFORMATION (UNAUDITED) (Details) (USD $)
In Thousands, except Per Share data, unless otherwise specified
3 Months Ended 12 Months Ended
Dec. 31, 2013
Sep. 30, 2013
Jun. 30, 2013
Mar. 31, 2013
Dec. 31, 2012
Sep. 30, 2012
Jun. 30, 2012
Mar. 31, 2012
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Quarterly Financial Information Disclosure [Abstract]                      
Operating Revenues $ 75,998 $ 80,997 $ 74,237 $ 67,727 $ 70,895 $ 77,989 $ 62,985 $ 61,052 $ 298,959 $ 272,921 $ 258,148
Operating Income 9,558 11,196 10,792 14,617 9,724 11,092 7,401 3,834 46,163 32,051 36,108
Net Income 1,677 5,088 4,950 6,589 3,531 5,200 3,648 (4,632) 18,304 7,747 2,108
Net Income attributable to Common Shares $ 1,752 $ 5,204 $ 5,055 $ 5,973 $ 1,436 $ 3,101 $ 1,513 $ (6,732) $ 17,984 $ (682) $ 1,898
Basic Earnings Per Common Share (in dollars per share) $ 0.09 $ 0.26 $ 0.25 $ 0.28              
Diluted Earnings Per Common Share (in dollars per share) $ 0.09 $ 0.25 $ 0.25 $ 0.28              
Basic and Diluted Earnings (Loss) Per Common Share (in dollars per share)         $ 0.06 $ 0.13 $ 0.06 $ (0.27) $ 0.88 $ (0.03) $ 0.18