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AFS Securities (AFS securities with gross unrealized losses) (Details) $ in Thousands	Jun. 30, 2019 USD ($) Securities	Dec. 31, 2018 USD ($) Securities
Debt Securities, Available-for-sale [Line Items]
Gross Unrealized Losses, Less Than Twelve Months	$ 6	$ 1,178
Fair Value, Less Than Twelve Months	3,193	80,103
Gross Unrealized Losses, Twelve Months or More	1,872	7,505
Fair Value, Twelve Months or More	133,233	229,996
Total Unrealized Losses	$ 1,878	$ 8,683
Number of Securities in an unrealized loss position, Less Than Twelve Months, Fair Value | Securities	1	66
Number of Securities in an unrealized loss position, Twelve Months or More, Fair Value | Securities	39	102
Number of Securities in an unrealized loss position, Total Unrealized Losses | Securities	40	168
Government sponsored enterprises [Member]
Debt Securities, Available-for-sale [Line Items]
Gross Unrealized Losses, Less Than Twelve Months	$ 0	$ 0
Fair Value, Less Than Twelve Months	0	0
Gross Unrealized Losses, Twelve Months or More	0	2
Fair Value, Twelve Months or More	0	170
Total Unrealized Losses	0	2
States and political subdivisions [Member]
Debt Securities, Available-for-sale [Line Items]
Gross Unrealized Losses, Less Than Twelve Months	0	83
Fair Value, Less Than Twelve Months	0	14,732
Gross Unrealized Losses, Twelve Months or More	1	168
Fair Value, Twelve Months or More	824	15,090
Total Unrealized Losses	1	251
Auction rate money market preferred [Member]
Debt Securities, Available-for-sale [Line Items]
Gross Unrealized Losses, Less Than Twelve Months	0	0
Fair Value, Less Than Twelve Months	0	0
Gross Unrealized Losses, Twelve Months or More	351	646
Fair Value, Twelve Months or More	2,849	2,554
Total Unrealized Losses	351	646
Mortgage-backed securities [Member]
Debt Securities, Available-for-sale [Line Items]
Gross Unrealized Losses, Less Than Twelve Months	6	896
Fair Value, Less Than Twelve Months	3,193	43,485
Gross Unrealized Losses, Twelve Months or More	1,267	4,384
Fair Value, Twelve Months or More	106,137	124,253
Total Unrealized Losses	1,273	5,280
Collateralized mortgage obligations [Member]
Debt Securities, Available-for-sale [Line Items]
Gross Unrealized Losses, Less Than Twelve Months	0	199
Fair Value, Less Than Twelve Months	0	21,886
Gross Unrealized Losses, Twelve Months or More	253	2,305
Fair Value, Twelve Months or More	23,423	87,929
Total Unrealized Losses	$ 253	$ 2,504

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
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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.

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- Definition

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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

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