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Loans and Asset Quality Information (Narrative) (Details) - USD ($) |  | 3 Months Ended | 6 Months Ended | 12 Months Ended |
--- | --- | --- | --- | --- | ---
Apr. 02, 2016 | Jun. 30, 2016 | Jun. 30, 2016 | Dec. 31, 2015 | Jun. 30, 2015
Total Covered Loans - Carrying Value |  | $ 78,387,000 | $ 78,387,000 | $ 102,641,000 | $ 113,824,000
Foreclosed real estate - covered |  | 385,000 | 385,000 | 806,000 | 1,945,000
Nonaccrual loans |  | 37,975,000 | 37,975,000 | 47,810,000 |
Unamortized premiums on loans |  | $ 1,074,000 | 1,074,000 | 873,000 | 819,000
Accretion of loan discount |  |  | $ 1,908,000 | 4,751,000 |
Percentage of loan discount accretion |  | 80.00% | 80.00% |  |
Contractual balance of nonaccrual loans |  | $ 5,000,000 | $ 5,000,000 | 12,300,000 | 12,700,000
Classified loans transferred to non-covered category upon expiration of FDIC loss share agreement |  | 3,800,000 | 3,800,000 |  |
Minimum [Member] |  |  |  |  |
Grading system for consumer loans |  |  | 500,000 |  |
Purchased Impaired Loans [Member] |  |  |  |  |
Accretion of loan discount |  | 741,000 | 780,000 |  |
Payments that exceeded the initial carrying amount on purchased impaired loans |  | 1,062,000 | 1,108,000 |  |
Additional loan interest income |  | 321,000 | 328,000 |  |
Non-Covered Purchased Nonimpaired Loans [Member] |  |  |  |  |
Accretion of loan discount |  |  | 43,000 |  |
Remaining loan discount for non-covered purchased nonaccruing loans |  | 391,000 | 391,000 |  |
Purchased Covered Nonimpaired Loans [Member] |  |  |  |  |
Accretion of loan discount |  |  | 1,908,000 | 4,751,000 |
Remaining loan discount for covered purchased accruing loans |  | 11,179,000 | 11,179,000 |  |
Remaining loan discount for covered purchased nonaccruing loans |  | 581,000 | 581,000 |  |
Non-covered [Member] |  |  |  |  |
Nonaccrual loans |  | 33,781,000 | 33,781,000 | 39,994,000 |
Unamortized premiums on loans |  | 1,074,000 | 1,074,000 | 873,000 | 819,000
Consumer loans moved from "special mention" to "pass" |  | 25,400,000 | 25,400,000 |  |
Reclassification of perfoming loans to FDIC loss-share provisions |  | 17,700,000 | 17,700,000 |  |
Covered [Member] |  |  |  |  |
Total Covered Loans - Carrying Value |  | 78,387,000 | 78,387,000 | 102,641,000 | 113,824,000
Nonaccrual loans |  | 4,194,000 | 4,194,000 | 7,816,000 |
Consumer loans moved from "special mention" to "pass" |  | 4,300,000 | 4,300,000 |  |
Real estate mortgage residential (1-4 family) first mortgages [Member] |  |  |  |  |
Total Covered Loans - Carrying Value |  | 68,079,000 | 68,079,000 | $ 75,657,000 |
Nonaccrual loans in process of foreclosure |  | $ 1,800,000 | $ 1,800,000 |  | $ 5,100,000
Covered Loss Sharing Protection Change [Member] |  |  |  |  |
Total Covered Loans - Carrying Value | $ 17,700,000 |  |  |  |
Foreclosed real estate - covered | 1,200,000 |  |  |  |
Nonaccrual loans | 2,800,000 |  |  |  |
Transfer of allowance of loan losses from covered to non-covered | 300,000 |  |  |  |
Total loans transferred to non-covered status | $ 17,700,000 |  |  |  |

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