Allowance For Credit Losses (Impaired Loans Individually Evaluated For Collectability) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2012	Dec. 31, 2011	Jun. 30, 2012	Jun. 30, 2011	Dec. 31, 2011
Allowance for Credit Losses [Abstract]
Total recorded investment	$ 9,146	$ 7,574	$ 9,146	$ 6,976	$ 7,574
Impaired loans with a specific allowance	2,114		2,114	3,971
Impaired loans without a specific allowance	7,032		7,032	3,005
Average recorded investment	8,240	7,780	8,018	7,073	7,356
Related Allowance, With allowance recorded	851	1,185	851	578	1,185
Total cash collected			249	823
Interest income recorded	$ 56		$ 56	$ 6	$ 59