Goodwill And Intangible Assets (Schedule Of Activity In Goodwill And Core Deposit Intangibles) (Details) (USD $)	3 Months Ended				6 Months Ended
	Dec. 31, 2011	Sep. 30, 2011	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011	Jun. 30, 2010
Goodwill And Intangible Assets
Goodwill, Beginning Balance		$ 72,334,000			$ 72,334,000
Goodwill, Amortization
Goodwill, Ending Balance			72,334,000		72,334,000
Core Deposit Intangibles, Beginning Balance		4,705,000			6,043,000
Core Deposit Intangibles, Amortization	669,000	669,000			1,338,000
Core Deposit Intangibles, Ending Balance			4,705,000		4,705,000
Total Goodwill and Core Deposit Intangibles, Beginning Balance		77,039,000			78,377,000
Amortization of intangibles			669,000	842,000	1,338,000	1,778,000
Total Goodwill and Core Deposit Intangibles, Ending Balance			$ 77,039,000		$ 77,039,000
Core deposit intangibles, useful life, minimum					6
Core deposit intangibles, useful life, maximum					10