Condensed Consolidated Statements of Comprehensive Income (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Net Income	$ 14,869	$ 10,727
Employee Benefits, net of tax:
Amortization of prior service cost, net of tax of ($6) and ($6), respectively	(9)	(9)
Net gain, net of tax of $38 and $50, respectively	58	76
Total other comprehensive income	49	67
Comprehensive Income	$ 14,918	$ 10,794