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Investment Securities (Tables) | 12 Months Ended
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Dec. 31, 2017
Investments, Debt and Equity Securities [Abstract] |
Available-for-sale Securities | The following table is the schedule of Available-For-Sale Securities at December 31, 2017 and 2016:
Available-For-Sale Securities
|  | U.S. Government & Agency Obligations |  | State and Municipal Obligations |  | Mortgage- Backed Securities |  | Corporate and Other Debt Securities |  | Mutual Funds and Equity Securities |  | Total Available- For-Sale Securities
December 31, 2017 |  |  |  |  |  |  |  |  |  |  |  |
Available-For-Sale Securities, at Amortized Cost |  | $ | 60,328 |  |  | $ | 10,351 |  |  | $ | 229,077 |  |  | $ | 1,000 |  |  | $ | 1,120 |  |  | $ | 301,876 |
Available-For-Sale Securities, at Fair Value |  | 59,894 |  |  | 10,349 |  |  | 227,596 |  |  | 800 |  |  | 1,561 |  |  | 300,200 |
Gross Unrealized Gains |  | — |  |  | 9 |  |  | 485 |  |  | — |  |  | 441 |  |  | 935 |
Gross Unrealized Losses |  | 434 |  |  | 11 |  |  | 1,966 |  |  | 200 |  |  | — |  |  | 2,611 |
Available-For-Sale Securities, Pledged as Collateral, at Fair Value |  |  |  |  |  |  |  |  |  |  |  | 183,052 |
Maturities of Debt Securities, at Amortized Cost: |  |  |  |  |  |  |  |  |  |  |  |
Within One Year |  | 13,025 |  |  | 8,902 |  |  | 2,619 |  |  | — |  |  |  |  | 24,546 |
From 1 - 5 Years |  | 47,303 |  |  | 679 |  |  | 103,078 |  |  | — |  |  |  |  | 151,060 |
From 5 - 10 Years |  | — |  |  | 250 |  |  | 75,570 |  |  | — |  |  |  |  | 75,820 |
Over 10 Years |  | — |  |  | 520 |  |  | 47,810 |  |  | 1,000 |  |  |  |  | 49,330 |
Maturities of Debt Securities, at Fair Value: |  |  |  |  |  |  |  |  |  |  |  |
Within One Year |  | 12,956 |  |  | 8,896 |  |  | 2,642 |  |  | — |  |  |  |  | 24,494 |
From 1 - 5 Years |  | 46,938 |  |  | 683 |  |  | 102,126 |  |  | — |  |  |  |  | 149,747 |
From 5 - 10 Years |  | — |  |  | 250 |  |  | 75,044 |  |  | — |  |  |  |  | 75,294 |
Over 10 Years |  | — |  |  | 520 |  |  | 47,784 |  |  | 800 |  |  |  |  | 49,104 |
Securities in a Continuous Loss Position, at Fair Value: |  |  |  |  |  |  |  |  |  |  |  |
Less than 12 Months |  | $ | 20,348 |  |  | $ | 8,498 |  |  | $ | 70,930 |  |  | $ | — |  |  | $ | — |  |  | $ | 99,776 |
12 Months or Longer |  | 39,546 |  |  | — |  |  | 80,759 |  |  | 800 |  |  | — |  |  | 121,105 |
Total |  | $ | 59,894 |  |  | $ | 8,498 |  |  | $ | 151,689 |  |  | $ | 800 |  |  | $ | — |  |  | $ | 220,881 |
Number of Securities in a Continuous Loss Position |  | 14 |  |  | 36 |  |  | 55 |  |  | 1 |  |  | — |  |  | 106 |
Unrealized Losses on Securities in a Continuous Loss Position: |  |  |  |  |  |  |  |  |  |  |  |
Less than 12 Months |  | $ | 172 |  |  | $ | 11 |  |  | $ | 363 |  |  | $ | — |  |  | $ | — |  |  | $ | 546 |
12 Months or Longer |  | 262 |  |  | — |  |  | 1,603 |  |  | 200 |  |  | — |  |  | 2,065 |
Total |  | $ | 434 |  |  | $ | 11 |  |  | $ | 1,966 |  |  | $ | 200 |  |  | $ | — |  |  | $ | 2,611 |
Disaggregated Details: |  |  |  |  |  |  |  |  |  |  |  |
US Treasury Obligations, at Amortized Cost |  | $ | — |  |  |  |  |  |  |  |  |  |  |
US Treasury Obligations, at Fair Value |  | — |  |  |  |  |  |  |  |  |  |  |
US Agency Obligations, at Amortized Cost |  | 60,328 |  |  |  |  |  |  |  |  |  |  |
US Agency Obligations, at Fair Value |  | 59,894 |  |  |  |  |  |  |  |  |  |  |
US Government Agency Securities, at Amortized Cost |  |  |  |  |  | $ | 40,832 |  |  |  |  |  |  |
US Government Agency Securities, at Fair Value |  |  |  |  |  | 40,832 |  |  |  |  |  |  |
Government Sponsored Entity Securities, at Amortized Cost |  |  |  |  |  | 188,245 |  |  |  |  |  |  |
Government Sponsored Entity Securities, at Fair Value |  |  |  |  |  | 186,764 |  |  |  |  |  |  |
Available-For-Sale Securities
|  | U.S. Government & Agency Obligations |  | State and Municipal Obligations |  | Mortgage- Backed Securities |  | Corporate and Other Debt Securities |  | Mutual Funds and Equity Securities |  | Total Available- For-Sale Securities
December 31, 2016 |  |  |  |  |  |  |  |  |  |  |  |
Available-For-Sale Securities, at Amortized Cost |  | $ | 147,110 |  |  | $ | 27,684 |  |  | $ | 168,189 |  |  | $ | 3,512 |  |  | $ | 1,120 |  |  | $ | 347,615 |
Available-For-Sale Securities, at Fair Value |  | 147,377 |  |  | 27,690 |  |  | 167,239 |  |  | 3,308 |  |  | 1,382 |  |  | 346,996 |
Gross Unrealized Gains |  | 304 |  |  | 24 |  |  | 986 |  |  | — |  |  | 262 |  |  | 1,576 |
Gross Unrealized Losses |  | 37 |  |  | 18 |  |  | 1,936 |  |  | 204 |  |  | — |  |  | 2,195 |
Available-For-Sale Securities, Pledged as Collateral, at Fair Value |  |  |  |  |  |  |  |  |  |  |  | 262,852 |
Securities in a Continuous Loss Position, at Fair Value: |  |  |  |  |  |  |  |  |  |  |  |
Less than 12 Months |  | $ | 70,605 |  |  | $ | 12,165 |  |  | $ | 126,825 |  |  | $ | 500 |  |  | $ | — |  |  | $ | 210,095 |
12 Months or Longer |  | — |  |  | 7,377 |  |  | — |  |  | 2,809 |  |  | — |  |  | 10,186 |
Total |  | $ | 70,605 |  |  | $ | 19,542 |  |  | $ | 126,825 |  |  | $ | 3,309 |  |  | $ | — |  |  | $ | 220,281 |
Number of Securities in a Continuous Loss Position |  | 19 |  |  | 84 |  |  | 40 |  |  | 4 |  |  | — |  |  | 147 |
Unrealized Losses on Securities in a Continuous Loss Position: |  |  |  |  |  |  |  |  |  |  |  |
Less than 12 Months |  | $ | 37 |  |  | $ | 13 |  |  | $ | 1,936 |  |  | $ | 1 |  |  | $ | — |  |  | $ | 1,987 |
12 Months or Longer |  | — |  |  | 5 |  |  | — |  |  | 203 |  |  | — |  |  | 208 |
Total |  | $ | 37 |  |  | $ | 18 |  |  | $ | 1,936 |  |  | $ | 204 |  |  | $ | — |  |  | $ | 2,195 |
Disaggregated Details: |  |  |  |  |  |  |  |  |  |  |  |
US Treasury Obligations, at Amortized Cost |  | $ | 54,701 |  |  |  |  |  |  |  |  |  |  |
US Treasury Obligations, at Fair Value |  | 54,706 |  |  |  |  |  |  |  |  |  |  |
US Agency Obligations, at Amortized Cost |  | 92,409 |  |  |  |  |  |  |  |  |  |  |
US Agency Obligations, at Fair Value |  | 92,671 |  |  |  |  |  |  |  |  |  |  |
US Government Agency Securities, at Amortized Cost |  |  |  |  |  | $ | 3,694 |  |  |  |  |  |  |
US Government Agency Securities, at Fair Value |  |  |  |  |  | 3,724 |  |  |  |  |  |  |
Government Sponsored Entity Securities, at Amortized Cost |  |  |  |  |  | 164,495 |  |  |  |  |  |  |
Government Sponsored Entity Securities, at Fair Value |  |  |  |  |  | 163,515 |  |  |  |  |  |  |
Held-to-maturity Securities | The following table is the schedule of Held-To-Maturity Securities at December 31, 2017 and 2016:
Held-To-Maturity Securities
|  | State and Municipal Obligations |  | Mortgage- Backed Securities |  | Corporate and Other Debt Securities |  | Total Held-To Maturity Securities
December 31, 2017 |  |  |  |  |  |  |  |
Held-To-Maturity Securities, at Amortized Cost |  | $ | 275,530 |  |  | $ | 60,377 |  |  | $ | — |  |  | $ | 335,907 |
Held-To-Maturity Securities, at Fair Value |  | 275,353 |  |  | 60,548 |  |  | — |  |  | 335,901 |
Gross Unrealized Gains |  | 1,691 |  |  | 269 |  |  | — |  |  | 1,960 |
Gross Unrealized Losses |  | 1,868 |  |  | 98 |  |  | — |  |  | 1,966 |
Held-To-Maturity Securities, Pledged as Collateral, at Fair Value |  |  |  |  |  |  |  | 318,622 |
Maturities of Debt Securities, at Amortized Cost: |  |  |  |  |  |  |  |
Within One Year |  | 38,422 |  |  | — |  |  | — |  |  | 38,422 |
From 1 - 5 Years |  | 80,789 |  |  | 54,212 |  |  | — |  |  | 135,001 |
From 5 - 10 Years |  | 152,918 |  |  | 6,165 |  |  | — |  |  | 159,083 |
Over 10 Years |  | 3,401 |  |  | — |  |  | — |  |  | 3,401 |
Maturities of Debt Securities, at Fair Value: |  |  |  |  |  |  |  |
Within One Year |  | 38,506 |  |  | — |  |  | — |  |  | 38,506 |
From 1 - 5 Years |  | 81,499 |  |  | 54,370 |  |  | — |  |  | 135,869 |
From 5 - 10 Years |  | 151,904 |  |  | 6,178 |  |  | — |  |  | 158,082 |
Over 10 Years |  | 3,444 |  |  | — |  |  | — |  |  | 3,444 |
Securities in a Continuous Loss Position, at Fair Value: |  |  |  |  |  |  |  |
Less than 12 Months |  | $ | 55,648 |  |  | $ | 13,764 |  |  | $ | — |  |  | $ | 69,412 |
12 Months or Longer |  | 65,152 |  |  | 3,257 |  |  | — |  |  | 68,409 |
Total |  | $ | 120,800 |  |  | $ | 17,021 |  |  | $ | — |  |  | $ | 137,821 |
Number of Securities in a Continuous Loss Position |  | 352 |  |  | 14 |  |  | — |  |  | 366 |
Unrealized Losses on Securities in a Continuous Loss Position: |  |  |  |  |  |  |  |
Less than 12 Months |  | $ | 442 |  |  | $ | 56 |  |  | $ | — |  |  | $ | 498 |
12 Months or Longer |  | 1,425 |  |  | 43 |  |  | — |  |  | 1,468 |
Total |  | $ | 1,867 |  |  | $ | 99 |  |  | $ | — |  |  | $ | 1,966 |
Disaggregated Details: |  |  |  |  |  |  |  |
US Government Agency Securities, at Amortized Cost |  |  |  | $ | 2,680 |  |  |  |  |
US Government Agency Securities, at Fair Value |  |  |  | 2,661 |  |  |  |  |
Government Sponsored Entity Securities, at Amortized Cost |  |  |  | 57,697 |  |  |  |  |
Government Sponsored Entity Securities, at Fair Value |  |  |  | 57,887 |  |  |  |  |
Held-To-Maturity Securities
|  | State and Municipal Obligations |  | Mortgage- Backed Securities |  | Corporate and Other Debt Securities |  | Total Held-To Maturity Securities
December 31, 2016 |  |  |  |  |  |  |  |
Held-To-Maturity Securities, at Amortized Cost |  | $ | 268,892 |  |  | $ | 75,535 |  |  | $ | 1,000 |  |  | $ | 345,427 |
Held-To-Maturity Securities, at Fair Value |  | 267,127 |  |  | 75,624 |  |  | 1,000 |  |  | 343,751 |
Gross Unrealized Gains |  | 2,058 |  |  | 258 |  |  | — |  |  | 2,316 |
Gross Unrealized Losses |  | 3,823 |  |  | 169 |  |  | — |  |  | 3,992 |
Held-To-Maturity Securities, Pledged as Collateral, at Fair Value |  |  |  |  |  |  |  | 321,202 |
Securities in a Continuous Loss Position, at Fair Value: |  |  |  |  |  |  |  |
Less than 12 Months |  | $ | 107,255 |  |  | $ | 13,306 |  |  | $ | — |  |  | $ | 120,561 |
12 Months or Longer |  | 12,363 |  |  | — |  |  | — |  |  | 12,363 |
Total |  | $ | 119,618 |  |  | $ | 13,306 |  |  | $ | — |  |  | $ | 132,924 |
Number of Securities in a Continuous Loss Position |  | 347 |  |  | 13 |  |  | — |  |  | 360 |
Unrealized Losses on Securities in a Continuous Loss Position: |  |  |  |  |  |  |  |
Less than 12 Months |  | $ | 3,129 |  |  | $ | 169 |  |  | $ | — |  |  | $ | 3,298 |
12 Months or Longer |  | 694 |  |  | — |  |  | — |  |  | 694 |
Total |  | $ | 3,823 |  |  | $ | 169 |  |  | $ | — |  |  | $ | 3,992 |
Disaggregated Details: |  |  |  |  |  |  |  |
US Government Agency Securities, at Amortized Cost |  |  |  | $ | 3,206 |  |  |  |  |
US Government Agency Securities, at Fair Value |  |  |  | 3,222 |  |  |  |  |
Government Sponsored Entity Securities, at Amortized Cost |  |  |  | 72,329 |  |  |  |  |
Government Sponsored Entity Securities, at Fair Value |  |  |  | 72,402 |  |  |  |  |
Schedule of Cost Method Investments | Schedule of Federal Reserve Bank and Federal Home Loan Bank Stock (at cost)
| December 31,
| 2017 |  | 2016
Federal Reserve Bank Stock | $ | 1,120 |  |  | $ | 1,071 |
Federal Home Loan Bank Stock | 8,829 |  |  | 9,841 |
Total Federal Reserve Bank and Federal Home Loan Bank Stock | $ | 9,949 |  |  | $ | 10,912 |

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- Definition Tabular disclosure of available-for-sale securities which includes, but is not limited to, changes in the cost basis and fair value, fair value and gross unrealized gain (loss), fair values by type of security, contractual maturity and classification, amortized cost basis, contracts to acquire securities to be accounted for as available-for-sale, debt maturities, transfers to trading, change in net unrealized holding gain (loss) net of tax, continuous unrealized loss position fair value, aggregate losses qualitative disclosures, other than temporary impairment (OTTI) losses or other disclosures related to available for sale securities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 320 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6957658&loc=d3e62557-112803 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=73527792&loc=d3e27337-111563 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=73527792&loc=d3e27198-111563 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 320 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6957658&loc=d3e62586-112803 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=73527792&loc=d3e27161-111563 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 9 -URI http://asc.fasb.org/extlink&oid=73527792&loc=d3e27357-111563 Reference 7: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=73527792&loc=d3e27290-111563 + Details
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- Definition Tabular disclosure of all investments in certain debt and equity securities for which the entity has the positive intent and ability to hold until maturity. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=73527792&loc=d3e27290-111563 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=73527792&loc=d3e27405-111563 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=73527792&loc=d3e27232-111563 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 320 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6957658&loc=d3e62586-112803 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=73527792&loc=d3e27337-111563 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 9 -URI http://asc.fasb.org/extlink&oid=6435544&loc=d3e41834-113960 Reference 7: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=66008989&loc=d3e5086-111524 Reference 8: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 320 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6957658&loc=d3e62557-112803 + Details
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- Definition A tabular disclosure of (a) the aggregate carrying amount of all cost-method investments; (b) the aggregate carrying amount of cost-method investments that the investor did not evaluate for impairment for cost-method investments. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 325 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6872867&loc=d3e40691-111596 + Details
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