Condensed Consolidated Statements of Comprehensive Income (Loss) (Unaudited) (Parenthetical) (USD $) In Thousands, unless otherwise specified	3 Months Ended				6 Months Ended
	Jun. 30, 2014		Jun. 30, 2013		Jun. 30, 2014	Jun. 30, 2013
Statement of Comprehensive Income [Abstract]
Net unrealized gain (loss) on cash flow hedges, tax	$ 267		$ 230		$ 505	$ 574
Net unrealized loss on investment securities, tax	1,249		(3,017)		2,453	(2,842)
Amortization of pension and postretirement costs, tax	$ 3,613	[1],[2]	$ 4,926	[1],[2]	$ 7,254	$ 11,266

[1] These items are included in the computation of net periodic costs of defined benefit pension plans and nonpension postretirement benefit plans (see Note 14 for additional details).

[2] Amounts in parentheses indicate debits (reductions) to income.