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