Note 12 - Pension and Other Postretirement Benefit Plans (Detail) - Employee Benefit Trust (EBT) shares: (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Shares owned by Employee Benefit Trust, balance	1,147,332	1,248,575
Market value of unallocated shares. (in Dollars)	$ 15,778,187	$ 14,490,803
Shares purchased	39,155	43,069
Shares released and allocated	(157,922)	(144,312)
Shares owned by Employee Benefit Trust, balance	1,028,565	1,147,332