Consolidated Statements of Changes in Common Shareholders' Equity (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Beginning Balance			$ 2,586,218
Net income for the year	45,134	52,047	50,393	83,615
Net income attributable to noncontrolling interest(s)	253	11	350	81
Dividends paid on redeemable preferred stock	206	222	650	673
Repurchase of Class B common stock			4,196	74,472
Cumulative Foreign Currency Translation Adjustment - Net other comprehensive income (loss)	(3,509)	(8,903)	(7,700)	(567)
Unrealized Gain on Available-for-Sale Securities - Net other comprehensive income (loss)	18,654	3,490	47,770	22,880
Unrealized Gain on Pensions and Other Postretirement Plans - Net other comprehensive income (loss)	(972)	(1,272)	(17)	(1,996)
Cash flow hedge			(84)
Ending Balance	$ 2,685,111		$ 2,685,111