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Investment Securities Available for Sale (Details) $ in Thousands | Mar. 31, 2018 USD ($) | Dec. 31, 2017 USD ($) | Mar. 31, 2017 USD ($)
--- | --- | --- | ---
Schedule of Available-for-sale Securities [Line Items] |  |  |
Available-For-Sale Securities, at Amortized Cost | $ 311,038 | $ 301,876 | $ 347,701
Available-for-Sale | 305,589 | 300,200 | 347,159
Gross Unrealized Gains | 354 | 935 | 1,519
Gross Unrealized Losses | 5,803 | 2,611 | 2,061
Available-For-Sale Securities, Pledged as Collateral | 229,857 | 183,052 | 295,797
Maturities of Debt Securities, at Amortized Cost: |  |  |
Within One Year | 22,272 |  |
From 1 - 5 Years | 169,873 |  |
From 5 - 10 Years | 71,681 |  |
Over 10 Years | 47,212 |  |
Maturities of Debt Securities, at Fair Value: |  |  |
Within One Year | 22,205 |  |
From 1 - 5 Years | 166,012 |  |
From 5 - 10 Years | 70,348 |  |
Over 10 Years | 47,024 |  |
Securities in a Continuous Loss Position, at Fair Value: |  |  |
Less than 12 Months | 136,627 | 99,776 | 174,194
12 Months or Longer | 124,088 | 121,105 | 800
Total | $ 260,715 | $ 220,881 | $ 174,994
Number of Securities in a Continuous Loss Position | 113 | 106 | 61
Unrealized Losses on Securities in a Continuous Loss Position: |  |  |
Less than 12 Months | $ 2,212 | $ 546 | $ 1,861
12 Months or Longer | 3,591 | 2,065 | 200
Total | 5,803 | 2,611 | 2,061
U.S. Agency Obligations |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |
Available-For-Sale Securities, at Amortized Cost | 60,264 | 60,328 | 147,012
Available-for-Sale | 59,657 | 59,894 | 147,231
Gross Unrealized Gains | 0 | 0 | 270
Gross Unrealized Losses | 607 | 434 | 52
Maturities of Debt Securities, at Amortized Cost: |  |  |
Within One Year | 13,018 |  |
From 1 - 5 Years | 47,246 |  |
From 5 - 10 Years | 0 |  |
Over 10 Years | 0 |  |
Maturities of Debt Securities, at Fair Value: |  |  |
Within One Year | 12,949 |  |
From 1 - 5 Years | 46,708 |  |
From 5 - 10 Years | 0 |  |
Over 10 Years | 0 |  |
Securities in a Continuous Loss Position, at Fair Value: |  |  |
Less than 12 Months | 17,128 | 20,348 | 42,937
12 Months or Longer | 42,529 | 39,546 | 0
Total | $ 59,657 | $ 59,894 | $ 42,937
Number of Securities in a Continuous Loss Position | 14 | 14 | 11
Unrealized Losses on Securities in a Continuous Loss Position: |  |  |
Less than 12 Months | $ 266 | $ 172 | $ 52
12 Months or Longer | 341 | 262 | 0
Total | 607 | 434 | 52
State and Municipal Obligations |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |
Available-For-Sale Securities, at Amortized Cost | 9,741 | 10,351 | 25,467
Available-for-Sale | 9,743 | 10,349 | 25,507
Gross Unrealized Gains | 7 | 9 | 40
Gross Unrealized Losses | 5 | 11 | 0
Maturities of Debt Securities, at Amortized Cost: |  |  |
Within One Year | 8,363 |  |
From 1 - 5 Years | 650 |  |
From 5 - 10 Years | 208 |  |
Over 10 Years | 520 |  |
Maturities of Debt Securities, at Fair Value: |  |  |
Within One Year | 8,360 |  |
From 1 - 5 Years | 655 |  |
From 5 - 10 Years | 208 |  |
Over 10 Years | 520 |  |
Securities in a Continuous Loss Position, at Fair Value: |  |  |
Less than 12 Months | 7,421 | 8,498 | 828
12 Months or Longer | 0 | 0 | 0
Total | $ 7,421 | $ 8,498 | $ 828
Number of Securities in a Continuous Loss Position | 29 | 36 | 5
Unrealized Losses on Securities in a Continuous Loss Position: |  |  |
Less than 12 Months | $ 6 | $ 11 | $ 0
12 Months or Longer | 0 | 0 | 0
Total | 6 | 11 | 0
Mortgage-Backed Securities - Residential |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |
Available-For-Sale Securities, at Amortized Cost | 240,033 | 229,077 | 170,601
Available-for-Sale | 235,389 | 227,596 | 169,728
Gross Unrealized Gains | 347 | 485 | 934
Gross Unrealized Losses | 4,991 | 1,966 | 1,806
Maturities of Debt Securities, at Amortized Cost: |  |  |
Within One Year | 891 |  |
From 1 - 5 Years | 121,977 |  |
From 5 - 10 Years | 71,473 |  |
Over 10 Years | 45,692 |  |
Maturities of Debt Securities, at Fair Value: |  |  |
Within One Year | 896 |  |
From 1 - 5 Years | 118,649 |  |
From 5 - 10 Years | 70,140 |  |
Over 10 Years | 45,704 |  |
Securities in a Continuous Loss Position, at Fair Value: |  |  |
Less than 12 Months | 112,078 | 70,930 | 127,931
12 Months or Longer | 80,759 | 80,759 | 0
Total | $ 192,837 | $ 151,689 | $ 127,931
Number of Securities in a Continuous Loss Position | 69 | 55 | 41
Unrealized Losses on Securities in a Continuous Loss Position: |  |  |
Less than 12 Months | $ 1,940 | $ 363 | $ 1,806
12 Months or Longer | 3,050 | 1,603 | 0
Total | 4,990 | 1,966 | 1,806
Corporate and Other Debt Securities |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |
Available-For-Sale Securities, at Amortized Cost | 1,000 | 1,000 | 3,501
Available-for-Sale | 800 | 800 | 3,298
Gross Unrealized Gains | 0 | 0 | 0
Gross Unrealized Losses | 200 | 200 | 203
Maturities of Debt Securities, at Amortized Cost: |  |  |
Within One Year | 0 |  |
From 1 - 5 Years | 0 |  |
From 5 - 10 Years | 0 |  |
Over 10 Years | 1,000 |  |
Maturities of Debt Securities, at Fair Value: |  |  |
Within One Year | 0 |  |
From 1 - 5 Years | 0 |  |
From 5 - 10 Years | 0 |  |
Over 10 Years | 800 |  |
Securities in a Continuous Loss Position, at Fair Value: |  |  |
Less than 12 Months | 0 | 0 | 2,498
12 Months or Longer | 800 | 800 | 800
Total | $ 800 | $ 800 | $ 3,298
Number of Securities in a Continuous Loss Position | 1 | 1 | 4
Unrealized Losses on Securities in a Continuous Loss Position: |  |  |
Less than 12 Months | $ 0 | $ 0 | $ 3
12 Months or Longer | 200 | 200 | 200
Total | 200 | 200 | 203
Equity Securities |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |
Available-For-Sale Securities, at Amortized Cost |  | 1,120 | 1,120
Available-for-Sale |  | 1,561 | 1,395
Gross Unrealized Gains |  | 441 | 275
Gross Unrealized Losses | 0 | 0 | 0
Securities in a Continuous Loss Position, at Fair Value: |  |  |
Less than 12 Months | 0 | 0 | 0
12 Months or Longer | 0 | 0 | 0
Total | $ 0 | $ 0 | $ 0
Number of Securities in a Continuous Loss Position | 0 | 0 | 0
Unrealized Losses on Securities in a Continuous Loss Position: |  |  |
Less than 12 Months | $ 0 | $ 0 | $ 0
12 Months or Longer | 0 | 0 | 0
Total | 0 | 0 | 0
Fair Value, Measurements, Recurring |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |
Available-for-Sale | 305,589 | 300,200 | 347,159
Fair Value, Measurements, Recurring | U.S. Agency Obligations |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |
Available-for-Sale | 59,657 | 59,894 | 147,231
Fair Value, Measurements, Recurring | State and Municipal Obligations |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |
Available-for-Sale | 9,743 | 10,349 | 25,507
Fair Value, Measurements, Recurring | Corporate and Other Debt Securities |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |
Available-for-Sale | 800 | 800 | 3,298
Fair Value, Measurements, Recurring | Equity Securities |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |
Available-for-Sale |  | 1,561 |
US Treasury Securities | U.S. Agency Obligations |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |
Available-For-Sale Securities, at Amortized Cost | 0 | 0 | 54,649
Available-for-Sale | 0 | 0 | 54,695
Agency Securities | U.S. Agency Obligations |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |
Available-For-Sale Securities, at Amortized Cost | 60,264 | 60,328 | 92,363
Available-for-Sale | 59,657 | 59,894 | 92,536
Agency Securities | Mortgage-Backed Securities - Residential |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |
Available-For-Sale Securities, at Amortized Cost | 59,446 | 40,832 | 1,616
Available-for-Sale | 59,469 | 40,832 | 1,625
US Government-sponsored Enterprises Debt Securities | Mortgage-Backed Securities - Residential |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |
Available-for-Sale | 175,920 | 186,764 | 168,103
US Government-sponsored Enterprises Debt Securities | Mortgage-Backed Securities - Residential | US Government-sponsored Enterprises Debt Securities |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |
Available-For-Sale Securities, at Amortized Cost | $ 180,587 | $ 188,245 | $ 168,985

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