Condensed Consolidated Statements of Retained Earnings (USD $) In Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011	Jun. 30, 2010
Condensed Consolidated Statements of Retained Earnings
Balance at the beginning of the period	$ 1,150,904	$ 1,039,008	$ 1,158,501	$ 1,100,086
Net income	60,654	62,701	103,547	105,413
Subtotal	1,211,558	1,101,709	1,262,048	1,205,499
Deduct dividends declared:
Common stock dividends declared to Holding Company	63,300	28,300	113,300	131,600
Preferred stock dividends declared	490	490	980	980
Subtotal	63,790	28,790	114,280	132,580
Balance at the end of the period	$ 1,147,768	$ 1,072,919	$ 1,147,768	$ 1,072,919