Loans Receivable (Schedule Of Carrying Amount Of Acquired Covered Loan) (Details) (USD $)	Jun. 30, 2011	Dec. 31, 2010
ASC 310-30 Loans	$ 235,205,000	$ 263,248,000
Non-ASC 310-30 Loans	1,227,472,000	1,319,499,000
Total Covered Loans	1,462,677,000	1,582,747,000
Residential Mortgage Loans [Member] | Residential 1-4 Family [Member]
ASC 310-30 Loans	48,069,000	50,566,000
Non-ASC 310-30 Loans	186,248,000	210,820,000
Total Covered Loans	234,317,000	261,386,000
Commercial Loans [Member] | Real Estate [Member]
ASC 310-30 Loans	132,798,000	146,331,000
Non-ASC 310-30 Loans	672,966,000	719,032,000
Total Covered Loans	805,764,000	865,363,000
Commercial Loans [Member] | Business [Member]
ASC 310-30 Loans	4,162,000	6,119,000
Non-ASC 310-30 Loans	154,298,000	168,385,000
Total Covered Loans	158,460,000	174,504,000
Consumer Loans [Member] | Home equity [Member]
ASC 310-30 Loans	49,594,000	59,689,000
Non-ASC 310-30 Loans	213,960,000	219,402,000
Total Covered Loans	263,554,000	279,091,000
Consumer Loans [Member] | Other Consumer [Member]
ASC 310-30 Loans	582,000	543,000
Non-ASC 310-30 Loans		1,860,000
Total Covered Loans	582,000	2,403,000
Residential Mortgage Loans [Member]
ASC 310-30 Loans	48,069,000	50,566,000
Non-ASC 310-30 Loans	186,248,000	210,820,000
Total Covered Loans	234,317,000	261,386,000
Commercial Loans [Member]
ASC 310-30 Loans	136,960,000	152,450,000
Non-ASC 310-30 Loans	827,264,000	887,417,000
Total Covered Loans	964,224,000	1,039,867,000
Consumer Loans [Member]
ASC 310-30 Loans	50,176,000	60,232,000
Non-ASC 310-30 Loans	213,960,000	221,262,000
Total Covered Loans	$ 264,136,000	$ 281,494,000