OTHER INCOME AND EXPENSES (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Other income and expenses
Revenue	$ 14,795	$ 16,686	$ 16,160
Expense	11,265	11,553	15,822
Operating and maintenance
Other income and expenses
Revenue	8,028	9,938	9,176
Expense	9,119	10,976	9,689
Meter reading and billing
Other income and expenses
Revenue	1,313	1,255	1,212
Expense	1,055	882	944
Leases
Other income and expenses
Revenue	1,938	1,956	1,892
Expense	243	153	330
Design and construction
Other income and expenses
Revenue	1,374	1,407	1,689
Expense	1,173	1,135	1,420
Interest income
Other income and expenses
Revenue	70	41	75
Change in value of life insurance contracts (gain) loss
Other income and expenses
Expense	(1,878)	(2,504)	1,876
Other non-regulated income and expenses
Other income and expenses
Revenue	2,072	2,089	2,116
Expense	$ 1,553	$ 911	$ 1,563