Mergers and Acquisitions (Details Textual) (USD $)	12 Months Ended
	Dec. 31, 2013
Business Acquisition
Business Combination, Consideration Transferred	$ 69,891,000
Cash consideration for outstanding shares	24,858,000
Core deposit intangible	5,739,000
Wheatland Bankshares
Business Acquisition
Effective Date of Acquisition	May 31, 2013
Percentage of Outstanding Common Stock Acquired	100.00%
Business Combination, Consideration Transferred	39,315,000
Number of Shares Issued for Aquisition	1,455,256
Cash consideration for outstanding shares	11,025,000
Loans receivable	171,199,000
Loans Receivable Acquired, Gross Principal and Contractual Interest Due	176,698,000
Loans Receivable Acquired, Gross Principal and Contractual Interest Due, Expected to be Uncollectible	0
Core deposit intangible	2,079,000
Core Deposit Intangible Assets, Weighted Average Useful Life	11 years
Third-party Acquisition Related Costs	832,000
Net interest income and non-interest income	7,946,000
Net income	2,100,000
North Cascades Bancshares
Business Acquisition
Effective Date of Acquisition	Jul. 31, 2013
Percentage of Outstanding Common Stock Acquired	100.00%
Business Combination, Consideration Transferred	30,576,000
Number of Shares Issued for Aquisition	687,876
Cash consideration for outstanding shares	13,833,000
Loans receivable	215,986,000
Loans Receivable Acquired, Gross Principal and Contractual Interest Due	223,949,000
Loans Receivable Acquired, Gross Principal and Contractual Interest Due, Expected to be Uncollectible	0
Core deposit intangible	3,660,000
Core Deposit Intangible Assets, Weighted Average Useful Life	10 years
Third-party Acquisition Related Costs	667,000
Net interest income and non-interest income	6,837,000
Net income	$ 1,108,000