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Portfolio Loans - Summary of Recorded Investment in Portfolio Loans by Class and Category Based on Impairment Method (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Loans - Ending balance:
Loans, including unearned loan fees	$ 5,314,337	$ 4,350,001
Non-Covered Loans
Balance December 31, 2019
Individually evaluated for impairment	2,567	4,453
Collectively evaluated for impairment	40,000	37,842
Total	42,567	42,295	$ 38,166	$ 37,565
Loans - Ending balance:
Individually evaluated for impairment	27,585	18,071
Collectively evaluated for impairment	5,196,463	4,285,529
Loans, including unearned loan fees	5,224,048	4,303,600
Total	5,226,664	4,305,626
Non-Covered Loans | Commercial and industrial
Balance December 31, 2019
Individually evaluated for impairment	2,286	4,266
Collectively evaluated for impairment	25,010	24,773
Total	27,296	29,039	26,406	26,996
Loans - Ending balance:
Individually evaluated for impairment	22,578	12,950
Collectively evaluated for impairment	2,323,245	2,108,058
Total	2,345,823	2,121,008
Non-Covered Loans | CRE - investor owned
Balance December 31, 2019
Individually evaluated for impairment	247	0
Collectively evaluated for impairment	5,688	4,683
Total	5,935	4,683	3,890	3,420
Loans - Ending balance:
Individually evaluated for impairment	2,303	398
Collectively evaluated for impairment	1,260,678	843,330
Total	1,262,981	843,728
Non-Covered Loans | CRE - owner occupied
Balance December 31, 2019
Individually evaluated for impairment	0	109
Collectively evaluated for impairment	4,873	4,130
Total	4,873	4,239	3,308	2,890
Loans - Ending balance:
Individually evaluated for impairment	1,373	2,135
Collectively evaluated for impairment	677,149	602,363
Total	678,522	604,498
Non-Covered Loans | Construction and land development
Balance December 31, 2019
Individually evaluated for impairment	0	0
Collectively evaluated for impairment	2,472	1,987
Total	2,472	1,987	1,487	1,304
Loans - Ending balance:
Individually evaluated for impairment	0	0
Collectively evaluated for impairment	449,380	330,097
Total	449,380	330,097
Non-Covered Loans | Residential real estate
Balance December 31, 2019
Individually evaluated for impairment	33	52
Collectively evaluated for impairment	1,247	1,564
Total	1,280	1,616	2,237	2,023
Loans - Ending balance:
Individually evaluated for impairment	1,330	2,277
Collectively evaluated for impairment	353,862	296,667
Total	355,192	298,944
Non-Covered Loans | Consumer and other
Balance December 31, 2019
Individually evaluated for impairment	1	26
Collectively evaluated for impairment	710	705
Total	711	731	$ 838	$ 932
Loans - Ending balance:
Individually evaluated for impairment	1	311
Collectively evaluated for impairment	132,149	105,014
Loans, including unearned loan fees	132,150	105,325
Total	$ 134,766	$ 107,351

X

- Definition

Amount of allowance for credit loss on financing receivable. Excludes allowance for financing receivable covered under loss sharing agreement.

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