Consolidated Statement of Other Comprehensive Income (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Tax	$ (34)	$ (4)
Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest	56,833	53,944
Net Income (Loss) Attributable to Non-controlling Interest		(21)
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	56,732	53,930
Comprehensive Income (Loss), Net of Tax, Attributable to Parent	$ 56,617	$ 53,965