Consolidated Statement of Comprehensive Income Parentheticals (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Consolidated Statement of Comprehensive Income
Amortization of defined benefit plan deferred losses, tax	$ 110,000	$ (500,000)	$ 310,000	$ (400,000)
Amortization of unrealized gain (loss) on derivative instruments, tax	$ (500,000)	$ (100,000)	$ 2,500,000	$ (600,000)