Consolidated Statement of Comprehensive Income Parentheticals (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Consolidated Statement of Comprehensive Income
Amortization of defined benefit plan deferred losses, tax	$ 100,000	$ 100,000	$ 200,000	$ 100,000
Amortization of unrealized gain (loss) on derivative instruments, tax	$ 2,500,000	$ (300,000)	$ 2,900,000	$ (600,000)