Consolidated Statements of Comprehensive Income (Unaudited) (Parantheticals) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Unrealized gain (loss) on available-for-sale securities, tax (benefit) expense	$ 63	$ 24	$ 38	$ 117
MGE [Member]
Unrealized gain (loss) on available-for-sale securities, tax (benefit) expense	$ 29	$ 33	$ (36)	$ 52