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Portfolio Loans - Summary of Portfolio Loans Individually Evaluated for Impairment by Category (Details) - Non-Covered Loans - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Financing Receivable, Impaired [Line Items]
Unpaid Contractual Principal Balance	$ 26,047	$ 24,343
Recorded Investment With No Allowance	5,823	4,856
Recorded Investment With Allowance	10,922	10,831
Total Recorded Investment	16,745	15,687
Related Allowance	4,453	2,579
Average Recorded Investment	15,573	19,722
Commercial and industrial
Financing Receivable, Impaired [Line Items]
Unpaid Contractual Principal Balance	21,893	20,750
Recorded Investment With No Allowance	3,294	2,321
Recorded Investment With Allowance	9,656	10,344
Total Recorded Investment	12,950	12,665
Related Allowance	4,266	2,508
Average Recorded Investment	13,827	16,270
CRE - investor owned
Financing Receivable, Impaired [Line Items]
Unpaid Contractual Principal Balance	553	560
Recorded Investment With No Allowance	398	422
Recorded Investment With Allowance	0	0
Total Recorded Investment	398	422
Related Allowance	0	0
Average Recorded Investment	277	521
CRE - owner occupied
Financing Receivable, Impaired [Line Items]
Unpaid Contractual Principal Balance	847	487
Recorded Investment With No Allowance	472	0
Recorded Investment With Allowance	336	487
Total Recorded Investment	808	487
Related Allowance	109	71
Average Recorded Investment	691	490
Construction and land development
Financing Receivable, Impaired [Line Items]
Unpaid Contractual Principal Balance	0	441
Recorded Investment With No Allowance	0	136
Recorded Investment With Allowance	0	0
Total Recorded Investment	0	136
Related Allowance	0	0
Average Recorded Investment	0	331
Residential real estate
Financing Receivable, Impaired [Line Items]
Unpaid Contractual Principal Balance	2,425	1,730
Recorded Investment With No Allowance	1,659	1,602
Recorded Investment With Allowance	618	0
Total Recorded Investment	2,277	1,602
Related Allowance	52	0
Average Recorded Investment	778	1,735
Consumer and other
Financing Receivable, Impaired [Line Items]
Unpaid Contractual Principal Balance	329	375
Recorded Investment With No Allowance	0	375
Recorded Investment With Allowance	312	0
Total Recorded Investment	312	375
Related Allowance	26	0
Average Recorded Investment	$ 0	$ 375

X

- Definition

Amount of valuation allowance for financing receivables that are expected to be uncollectible that were individually evaluated for impairment.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 11B
-Subparagraph (g)
-URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953423-111524

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+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 15
-Subparagraph (c)(1)
-URI http://asc.fasb.org/extlink&oid=84173941&loc=d3e5212-111524

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
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-Section 50
-Paragraph 17
-URI http://asc.fasb.org/extlink&oid=84173941&loc=d3e5258-111524

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+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 14A
-Subparagraph (b)
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+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 15
-Subparagraph (a)(4)
-URI http://asc.fasb.org/extlink&oid=84173941&loc=d3e5212-111524

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+ References

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+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
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-Topic 310
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