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Investment Securities Available for Sale (Details) $ in Thousands | Jun. 30, 2018 USD ($) | Dec. 31, 2017 USD ($) | Jun. 30, 2017 USD ($)
--- | --- | --- | ---
Schedule of Available-for-sale Securities [Line Items] |  |  |
Available-For-Sale Securities, at Amortized Cost | $ 331,689 |  |
Available-For-Sale Securities, at Amortized Cost |  | $ 301,876 | $ 327,268
Securities Available-for-Sale |  | 300,200 | 327,392
Available-for-Sale | 325,387 | 300,200 | 327,392
Gross Unrealized Gains | 338 |  |
Gross Unrealized Gains |  | 935 | 1,617
Gross Unrealized Losses | 6,640 |  |
Gross Unrealized Losses |  | 2,611 | 1,493
Available-For-Sale Securities, Pledged as Collateral | 282,481 | 183,052 | 267,912
Maturities of Debt Securities, at Amortized Cost: |  |  |
Within One Year | 46,254 |  |
From 1 - 5 Years | 154,228 |  |
From 5 - 10 Years | 79,608 |  |
Over 10 Years | 51,599 |  |
Maturities of Debt Securities, at Fair Value: |  |  |
Within One Year | 45,979 |  |
From 1 - 5 Years | 149,428 |  |
From 5 - 10 Years | 78,552 |  |
Over 10 Years | 51,428 |  |
Securities in a Continuous Loss Position, at Fair Value: |  |  |
Less than 12 Months | 163,280 | 99,776 | 149,088
12 Months or Longer | 115,406 | 121,105 | 800
Total | $ 278,686 | $ 220,881 | $ 149,888
Number of Securities in a Continuous Loss Position | 100 | 106 | 52
Unrealized Losses on Securities in a Continuous Loss Position: |  |  |
Less than 12 Months | $ 2,706 | $ 546 | $ 1,293
12 Months or Longer | 3,934 | 2,065 | 200
Total | 6,640 | 2,611 | 1,493
U.S. Agency Obligations |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |
Available-For-Sale Securities, at Amortized Cost | 60,199 |  |
Available-For-Sale Securities, at Amortized Cost |  | 60,328 | 146,914
Securities Available-for-Sale |  | 59,894 | 147,085
Available-for-Sale | 59,615 |  |
Gross Unrealized Gains | 0 |  |
Gross Unrealized Gains |  | 0 | 252
Gross Unrealized Losses | 584 |  |
Gross Unrealized Losses |  | 434 | 81
Maturities of Debt Securities, at Amortized Cost: |  |  |
Within One Year | 42,683 |  |
From 1 - 5 Years | 17,516 |  |
From 5 - 10 Years | 0 |  |
Over 10 Years | 0 |  |
Maturities of Debt Securities, at Fair Value: |  |  |
Within One Year | 42,396 |  |
From 1 - 5 Years | 17,219 |  |
From 5 - 10 Years | 0 |  |
Over 10 Years | 0 |  |
Securities in a Continuous Loss Position, at Fair Value: |  |  |
Less than 12 Months | 17,218 | 20,348 | 49,176
12 Months or Longer | 42,397 | 39,546 | 0
Total | $ 59,615 | $ 59,894 | $ 49,176
Number of Securities in a Continuous Loss Position | 14 | 14 | 13
Unrealized Losses on Securities in a Continuous Loss Position: |  |  |
Less than 12 Months | $ 297 | $ 172 | $ 81
12 Months or Longer | 287 | 262 | 0
Total | 584 | 434 | 81
State and Municipal Obligations |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |
Available-For-Sale Securities, at Amortized Cost | 3,377 |  |
Available-For-Sale Securities, at Amortized Cost |  | 10,351 | 15,410
Securities Available-for-Sale |  | 10,349 | 15,441
Available-for-Sale | 3,383 |  |
Gross Unrealized Gains | 6 |  |
Gross Unrealized Gains |  | 9 | 31
Gross Unrealized Losses | 0 |  |
Gross Unrealized Losses |  | 11 | 0
Maturities of Debt Securities, at Amortized Cost: |  |  |
Within One Year | 2,124 |  |
From 1 - 5 Years | 773 |  |
From 5 - 10 Years | 0 |  |
Over 10 Years | 480 |  |
Maturities of Debt Securities, at Fair Value: |  |  |
Within One Year | 2,125 |  |
From 1 - 5 Years | 778 |  |
From 5 - 10 Years | 0 |  |
Over 10 Years | 480 |  |
Securities in a Continuous Loss Position, at Fair Value: |  |  |
Less than 12 Months | 1,797 | 8,498 | 543
12 Months or Longer | 0 | 0 | 0
Total | $ 1,797 | $ 8,498 | $ 543
Number of Securities in a Continuous Loss Position | 6 | 36 | 2
Unrealized Losses on Securities in a Continuous Loss Position: |  |  |
Less than 12 Months | $ 0 | $ 11 | $ 0
12 Months or Longer | 0 | 0 | 0
Total | 0 | 11 | 0
Mortgage-Backed Securities - Residential |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |
Available-For-Sale Securities, at Amortized Cost | 267,113 |  |
Available-For-Sale Securities, at Amortized Cost |  | 229,077 | 161,324
Securities Available-for-Sale |  | 227,596 | 161,077
Available-for-Sale | 261,589 |  |
Gross Unrealized Gains | 332 |  |
Gross Unrealized Gains |  | 485 | 964
Gross Unrealized Losses | 5,856 |  |
Gross Unrealized Losses |  | 1,966 | 1,211
Maturities of Debt Securities, at Amortized Cost: |  |  |
Within One Year | 1,447 |  |
From 1 - 5 Years | 135,939 |  |
From 5 - 10 Years | 79,608 |  |
Over 10 Years | 50,119 |  |
Maturities of Debt Securities, at Fair Value: |  |  |
Within One Year | 1,458 |  |
From 1 - 5 Years | 131,431 |  |
From 5 - 10 Years | 78,552 |  |
Over 10 Years | 50,148 |  |
Securities in a Continuous Loss Position, at Fair Value: |  |  |
Less than 12 Months | 144,265 | 70,930 | 97,870
12 Months or Longer | 72,209 | 80,759 | 0
Total | $ 216,474 | $ 151,689 | $ 97,870
Number of Securities in a Continuous Loss Position | 79 | 55 | 34
Unrealized Losses on Securities in a Continuous Loss Position: |  |  |
Less than 12 Months | $ 2,409 | $ 363 | $ 1,211
12 Months or Longer | 3,447 | 1,603 | 0
Total | 5,856 | 1,966 | 1,211
Corporate and Other Debt Securities |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |
Available-For-Sale Securities, at Amortized Cost | 1,000 |  |
Available-For-Sale Securities, at Amortized Cost |  | 1,000 | 2,500
Securities Available-for-Sale |  | 800 | 2,299
Available-for-Sale | 800 |  |
Gross Unrealized Gains | 0 |  |
Gross Unrealized Gains |  | 0 | 0
Gross Unrealized Losses | 200 |  |
Gross Unrealized Losses |  | 200 | 201
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 | 1,499
12 Months or Longer | 800 | 800 | 800
Total | $ 800 | $ 800 | $ 2,299
Number of Securities in a Continuous Loss Position | 1 | 1 | 3
Unrealized Losses on Securities in a Continuous Loss Position: |  |  |
Less than 12 Months | $ 0 | $ 0 | $ 1
12 Months or Longer | 200 | 200 | 200
Total | 200 | 200 | 201
Mutual Funds and Equity Securities |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |
Available-For-Sale Securities, at Amortized Cost |  | 1,120 | 1,120
Securities Available-for-Sale |  | 1,561 | 1,490
Gross Unrealized Gains |  | 441 | 370
Gross Unrealized Losses |  | 0 | 0
Securities in a Continuous Loss Position, at Fair Value: |  |  |
Less than 12 Months |  | 0 | 0
12 Months or Longer |  | 0 | 0
Total |  | $ 0 | $ 0
Number of Securities in a Continuous Loss Position |  | 0 | 0
Unrealized Losses on Securities in a Continuous Loss Position: |  |  |
Less than 12 Months |  | $ 0 | $ 0
12 Months or Longer |  | 0 | 0
Total |  | 0 | 0
US Treasury Securities | U.S. Agency Obligations |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |
Available-For-Sale Securities, at Amortized Cost | 0 |  |
Available-For-Sale Securities, at Amortized Cost |  | 0 | 54,597
Securities Available-for-Sale |  | 0 |
Available-for-Sale | 0 |  | 54,676
Agency Securities | U.S. Agency Obligations |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |
Available-For-Sale Securities, at Amortized Cost | 60,199 |  |
Available-For-Sale Securities, at Amortized Cost |  | 60,328 | 92,317
Securities Available-for-Sale |  | 59,894 |
Available-for-Sale | 59,615 |  | 92,409
Agency Securities | Mortgage-Backed Securities - Residential |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |
Available-For-Sale Securities, at Amortized Cost | 68,030 |  |
Available-For-Sale Securities, at Amortized Cost |  | 40,832 | 3,740
Securities Available-for-Sale |  | 40,832 |
Available-for-Sale | 68,083 |  | 3,756
US Government-sponsored Enterprises Debt Securities | Mortgage-Backed Securities - Residential |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |
Securities Available-for-Sale |  | 186,764 |
Available-for-Sale | 193,506 |  | 157,321
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 | $ 199,083 |  |
Available-For-Sale Securities, at Amortized Cost |  | $ 188,245 | $ 157,584

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