Goodwill and Intangible Assets (Details 2) (USD $)	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Dec. 31, 2014
Goodwill and Intangible Assets
Estimated fair value of MSRs	$ 2,200,000		$ 3,400,000
Total outstanding principal balances of loans serviced for others	418,400,000		421,100,000
Changes in net carrying amount of finite-lived intangible MSRs
Balance at beginning of period	1,131,000	1,832,000
Additions for mortgage loans sold	116,000	80,000
Amortization	(180,000)	(233,000)
Balance at end of period	1,067,000	1,679,000
Oldham
Goodwill and Intangible Assets
Amortization period of intangible assets	10 years
Oldham | Core deposit
Goodwill and Intangible Assets
Intangible assets recorded on acquisition	2,500,000
Amortization period of intangible assets	15 years
Unamortized intangible	$ 1,800,000