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Consideration Transferred, Identifiable Net Assets Acquired and Goodwill Recognized (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Liabilities assumed |  |  |  |
Goodwill recognized |  | $ 30,758 | $ 6,415 | $ 10,932
The Foothills Bank |  |  |  |
Fair value of consideration transferred |  |  |  |
Fair value of Company shares issued, net of equity issuance costs |  | 46,673 |  |
Cash consideration for outstanding shares |  | 17,342 |  |
Contingent consideration |  | 0 |  |
Total fair value of consideration transferred |  | 64,015 |  |
Identifiable assets acquired |  |  |  |
Cash and cash equivalents |  | 13,251 |  |
Investment securities |  | 25,420 |  |
Loans receivable |  | 292,529 |  |
Core deposit intangible | [1] | 4,331 |  |
Accrued income and other assets |  | 19,699 |  |
Total identifiable assets acquired |  | 355,230 |  |
Liabilities assumed |  |  |  |
Deposits |  | 296,760 |  |
FHLB advances |  | 22,800 |  |
Accrued expenses and other liabilities |  | 2,264 |  |
Total liabilities assumed |  | 321,824 |  |
Total identifiable net assets |  | 33,406 |  |
Goodwill recognized |  | $ 30,609 |  |
Core Deposit Intangible, Weighted Average Useful Life |  | 10 years |  |
Treasure State Bank |  |  |  |
Fair value of consideration transferred |  |  |  |
Fair value of Company shares issued, net of equity issuance costs |  |  | 10,465 |
Cash consideration for outstanding shares |  |  | 3,475 |
Contingent consideration |  |  | 0 |
Total fair value of consideration transferred |  |  | 13,940 |
Identifiable assets acquired |  |  |  |
Cash and cash equivalents |  |  | 10,176 |
Investment securities |  |  | 0 |
Loans receivable |  |  | 51,875 |
Core deposit intangible | [1] |  | 762 |
Accrued income and other assets |  |  | 6,937 |
Total identifiable assets acquired |  |  | 69,750 |
Liabilities assumed |  |  |  |
Deposits |  |  | 58,364 |
FHLB advances |  |  | 3,260 |
Accrued expenses and other liabilities |  |  | 601 |
Total liabilities assumed |  |  | 62,225 |
Total identifiable net assets |  |  | 7,525 |
Goodwill recognized |  |  | $ 6,415 |
Core Deposit Intangible, Weighted Average Useful Life |  |  | 10 years |
[1] | The core deposit intangible for each acquisition was determined to have an estimated life of 10 years.

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