Condensed Consolidated Statements of Comprehensive Income (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Net Income	$ 4,356	$ 5,060	$ 19,225	$ 15,787
Employee Benefits, net of tax:
Amortization of prior service cost, net of tax of ($6), ($6), ($12) and ($13), respectively	(9)	(9)	(18)	(19)
Net gain, net of tax of $43, $50, $81 and $101, respectively	64	76	122	152
Total other comprehensive income	55	67	104	133
Comprehensive Income	$ 4,411	$ 5,127	$ 19,329	$ 15,920