Fair Value Measurements Assets Measured at Fair Value on a Nonrecurring Basis (Details) (Fair Value, Measurements, Nonrecurring [Member], USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Level 1 [Member]
Net loans	$ 0	$ 0
Total assets	0	0
Level 1 [Member] | Other Assets [Member]
Other finanical assets	0	0
Level 2 [Member]
Net loans	0	0
Total assets	0	0
Level 2 [Member] | Other Assets [Member]
Other finanical assets	0	0
Level 3 [Member]
Net loans	182,433	191,165
Total assets	243,579	253,368
Level 3 [Member] | Other Assets [Member]
Other finanical assets	61,146	62,203
Total [Member]
Net loans	182,433	191,165
Total assets	243,579	253,368
Total [Member] | Other Assets [Member]
Other finanical assets	$ 61,146	$ 62,203