Long-Term Debt (Details 2) (USD $)	Dec. 31, 2012	Dec. 31, 2011
Annual maturities of all long-term debt, including capitalized leases
Total	$ 335,791,000	$ 340,686,000
GSWC
Annual maturities of all long-term debt, including capitalized leases
2013	3,328,000
2014	6,297,000
2015	290,000
2016	309,000
2017	327,000
Thereafter	325,240,000
Total	$ 335,791,000	$ 340,686,000