Consolidated Statements Of Comprehensive Income (Parenthetical) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Statement of Comprehensive Income [Abstract]
Unrealized investment gains - taxes	$ 201	$ (721)	$ 664	$ (760)
Realized investment gains - taxes	0	(6)	(1)	(7)
Realized investment losses - taxes	273	0	273	0
Change in unfunded benefit obligation for pension and other postretirement benefit plans - taxes	$ 62	$ 99	$ 121	$ 198