Statement of Changes in Shareholders' Equity (USD $) In Thousands	Common Stock Amount [Member]	Paid-in Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income [Member]	Total
Balance at Dec. 31, 2010	$ 46	$ 1,043,027	$ (3,480)	$ 105,891	$ 1,145,484
Issuance of common stock	29	817,707			817,736
Share based compensation		401			401
Dividends declared on common stock			(133,163)		(133,163)
Comprehensive income:
Net income			134,766		134,766
Other comprehensive income:
Net unrealized gain on securities available for sale				96,950	96,950
Net unrealized loss on derivative instruments				(55,568)	(55,568)
Comprehensive income					176,148
Balance at Jun. 30, 2011	$ 75	$ 1,861,135	$ (1,877)	$ 147,273	$ 2,006,606

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