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Loans and Allowance for Credit Losses (Details 6) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2019	Dec. 31, 2018	Dec. 31, 2018
Unpaid Contractual Principal Balance	$ 71,566	$ 40,774	$ 40,774
Recorded Investment With No Allowance	56,165	13,166	13,166
Recorded Investment With Allowance	10,273	27,136	27,136
Total Recorded Investment	66,438	40,302	40,302
Related Allowance	6,507	8,918	8,918
Average Recorded Investment	53,371	36,463	30,955
Interest Income Recognized	328	110	1,006
Commercial [Member]
Unpaid Contractual Principal Balance	13,453	8,613	8,613
Recorded Investment With No Allowance	4,124	2,057	2,057
Recorded Investment With Allowance	8,857	6,084	6,084
Total Recorded Investment	12,981	8,141	8,141
Related Allowance	5,892	4,803	4,803
Average Recorded Investment	10,561	10,306	8,359
Interest Income Recognized	19	(126)	190
Income Producing - Commercial Real Estate [Member]
Unpaid Contractual Principal Balance	42,939	21,402	21,402
Recorded Investment With No Allowance	39,397	1,720	1,720
Recorded Investment With Allowance	46	19,682	19,682
Total Recorded Investment	39,443	21,402	21,402
Related Allowance	15	2,465	2,465
Average Recorded Investment	30,423	15,331	12,309
Interest Income Recognized	263	189	550
Owner Occupied - Commercial Real Estate - [Member]
Unpaid Contractual Principal Balance	4,853	5,731	5,731
Recorded Investment With No Allowance	3,483	4,361	4,361
Recorded Investment With Allowance	1,370	1,370	1,370
Total Recorded Investment	4,853	5,731	5,731
Related Allowance	600	600	600
Average Recorded Investment	5,292	5,746	6,011
Interest Income Recognized	46	47	196
Real Estate Mortgage Residential [Member]
Unpaid Contractual Principal Balance	5,644	1,510	1,510
Recorded Investment With No Allowance	5,644	1,510	1,510
Total Recorded Investment	5,644	1,510	1,510
Average Recorded Investment	3,577	1,516	1,688
Interest Income Recognized			2
Construction - Commercial and Residential [Member]
Unpaid Contractual Principal Balance	4,190	3,031	3,031
Recorded Investment With No Allowance	3,030	3,031	3,031
Total Recorded Investment	3,030	3,031	3,031
Related Allowance		1,050	1,050
Average Recorded Investment	3,031	3,031	2,028
Interest Income Recognized			68
Home Equity [Member]
Unpaid Contractual Principal Balance	487	487	487
Recorded Investment With No Allowance	487	487	487
Total Recorded Investment	487	487	487
Average Recorded Investment	$ 487	487	491
Other Consumer [Member]
Average Recorded Investment		$ 46	$ 69

X

- Definition

Average amount of investment of impaired financing receivables with related allowance for credit losses and without a related allowance for credit losses.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 15
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