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Consideration Transferred, Identifiable Net Assets Acquired and Goodwill Recognized (Details) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
--- | ---
Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2011
Fair value of consideration transferred |  |  |
Fair value of Company shares issued, net of equity issuance costs | $ 45,033 |  |
Cash consideration for outstanding shares | 24,858 |  |
Total fair value of consideration transferred | 69,891 |  |
Identifiable assets acquired |  |  |
Cash and cash equivalents | 51,013 |  |
Investment securities, available-for-sale | 123,701 |  |
Loans receivable | 387,185 |  |
Core deposit intangible | 5,739 |  |
Accrued income and other assets | 39,325 |  |
Total identifiable assets acquired | 606,963 |  |
Liabilities assumed |  |  |
Deposits | 550,177 |  |
Federal Home Loan Bank advances and other borrowed funds | 5,467 |  |
Accrued expenses and other liabilities | 5,034 |  |
Total liabilities assumed | 560,678 |  |
Total identifiable net assets | 46,285 |  |
Goodwill recognized | 23,606 | 0 | 0
Wheatland Bankshares |  |  |
Fair value of consideration transferred |  |  |
Fair value of Company shares issued, net of equity issuance costs | 28,290 |  |
Cash consideration for outstanding shares | 11,025 |  |
Total fair value of consideration transferred | 39,315 |  |
Identifiable assets acquired |  |  |
Cash and cash equivalents | 23,148 |  |
Investment securities, available-for-sale | 75,643 |  |
Loans receivable | 171,199 |  |
Core deposit intangible | 2,079 |  |
Accrued income and other assets | 15,063 |  |
Total identifiable assets acquired | 287,132 |  |
Liabilities assumed |  |  |
Deposits | 255,197 |  |
Federal Home Loan Bank advances and other borrowed funds | 5,467 |  |
Accrued expenses and other liabilities | 562 |  |
Total liabilities assumed | 261,226 |  |
Total identifiable net assets | 25,906 |  |
Goodwill recognized | 13,409 |  |
North Cascades Bancshares |  |  |
Fair value of consideration transferred |  |  |
Fair value of Company shares issued, net of equity issuance costs | 16,743 |  |
Cash consideration for outstanding shares | 13,833 |  |
Total fair value of consideration transferred | 30,576 |  |
Identifiable assets acquired |  |  |
Cash and cash equivalents | 27,865 |  |
Investment securities, available-for-sale | 48,058 |  |
Loans receivable | 215,986 |  |
Core deposit intangible | 3,660 |  |
Accrued income and other assets | 24,262 |  |
Total identifiable assets acquired | 319,831 |  |
Liabilities assumed |  |  |
Deposits | 294,980 |  |
Federal Home Loan Bank advances and other borrowed funds | 0 |  |
Accrued expenses and other liabilities | 4,472 |  |
Total liabilities assumed | 299,452 |  |
Total identifiable net assets | 20,379 |  |
Goodwill recognized | $ 10,197 |  |

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- Definition Amount of currency on hand as well as demand deposits with banks or financial institutions, acquired at the acquisition date. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6910749&loc=d3e4845-128472 + Details
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- Definition Amount recognized as of the acquisition date for the identifiable assets acquired in excess of (less than) the aggregate liabilities assumed. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6910749&loc=d3e4845-128472 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 55 -Paragraph 37 -URI http://asc.fasb.org/extlink&oid=25498275&loc=d3e2207-128464 + Details
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- Definition Amount of increase in asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized resulting from a business combination. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=14024403&loc=d3e13816-109267 + Details
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