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Investment Securities - Schedule of Available for Sale Securities Continuous Unrealized Loss Position Fair Value (Details) $ in Thousands	Dec. 31, 2018 USD ($) Number	Dec. 31, 2017 USD ($) Number
Debt Securities, Available-for-sale [Line Items]
No. of securities | Number	490	345
Fair value, Less than 12 months	$ 74,366	$ 134,700
Unrealized losses, Less than 12 months	(536)	(1,022)
Fair value, 12 months or longer	221,001	89,790
Unrealized losses, 12 months or longer	(5,579)	(2,001)
Total, Fair value	295,367	224,490
Total, Unrealized losses	$ (6,115)	$ (3,023)
US Treasury Securities [Member]
Debt Securities, Available-for-sale [Line Items]
No. of securities | Number	1	1
Fair value, Less than 12 months		$ 1,990
Unrealized losses, Less than 12 months		(9)
Fair value, 12 months or longer	1,971
Unrealized losses, 12 months or longer	(28)
Total, Fair value	1,971	1,990
Total, Unrealized losses	$ (28)	$ (9)
US Federal Agency Obligations [Member]
Debt Securities, Available-for-sale [Line Items]
No. of securities | Number	6	14
Fair value, Less than 12 months	$ 145	$ 7,989
Unrealized losses, Less than 12 months	(1)	(24)
Fair value, 12 months or longer	7,970	8,272
Unrealized losses, 12 months or longer	(40)	(61)
Total, Fair value	8,115	16,261
Total, Unrealized losses	$ (41)	$ (85)
Municipal Obligations, Tax Exempt [Member]
Debt Securities, Available-for-sale [Line Items]
No. of securities | Number	296	178
Fair value, Less than 12 months	$ 35,898	$ 37,299
Unrealized losses, Less than 12 months	(367)	(273)
Fair value, 12 months or longer	85,921	31,930
Unrealized losses, 12 months or longer	(2,403)	(807)
Total, Fair value	121,819	69,229
Total, Unrealized losses	$ (2,770)	$ (1,080)
Municipal Obligations, Taxable [Member]
Debt Securities, Available-for-sale [Line Items]
No. of securities | Number	86	73
Fair value, Less than 12 months	$ 8,293	$ 18,792
Unrealized losses, Less than 12 months	(22)	(96)
Fair value, 12 months or longer	28,984	9,744
Unrealized losses, 12 months or longer	(301)	(120)
Total, Fair value	37,277	28,536
Total, Unrealized losses	$ (323)	$ (216)
Agency Mortgage-backed Securities [Member]
Debt Securities, Available-for-sale [Line Items]
No. of securities | Number	101	79
Fair value, Less than 12 months	$ 30,030	$ 68,630
Unrealized losses, Less than 12 months	(146)	(620)
Fair value, 12 months or longer	96,155	39,844
Unrealized losses, 12 months or longer	(2,807)	(1,013)
Total, Fair value	126,185	108,474
Total, Unrealized losses	$ (2,953)	$ (1,633)

X

- Definition

Amount of accumulated unrealized loss on investments in debt and equity securities classified as available-for-sale that have been in a continuous loss position for twelve months or longer.

+ References

No definition available.

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- Definition

Amount of accumulated unrealized loss on investments in debt and equity securities classified as available-for-sale in a continuous loss position.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 7
-URI http://asc.fasb.org/extlink&oid=82897076&loc=d3e27337-111563

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- Definition

This item represents the aggregate fair value of investments in debt and equity securities in an unrealized loss position which are categorized neither as held-to-maturity nor trading securities.

+ References

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Amount of accumulated unrealized loss on investments in debt and equity securities classified as available-for-sale that have been in a continuous loss position for less than twelve months.

+ References

No definition available.

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+ References

No definition available.

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+ References

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- Definition

Number of investment positions in available-for-sale investments in a continuous unrealized loss position for which an other-than-temporary impairment (OTTI) has not been recognized in the income statement.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 6
-Subparagraph (b)(3)
-URI http://asc.fasb.org/extlink&oid=82897076&loc=d3e27290-111563

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