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Portfolio Loans - Summary of risk grades segregated by category (Details) - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Loans
Portfolio loans	$ 7,185,650	$ 6,814,177
Pass
Loans
Portfolio loans	6,426,332	6,016,748
Watch
Loans
Portfolio loans	540,258	554,970
Special Mention
Loans
Portfolio loans	146,235	150,481
Substandard
Loans
Portfolio loans	45,100	69,048
Substandard Non-accrual
Loans
Portfolio loans	27,725	22,930
Commercial
Loans
Portfolio loans	2,054,550	2,014,576
Commercial | Pass
Loans
Portfolio loans	1,816,456	1,768,755
Commercial | Watch
Loans
Portfolio loans	131,361	136,948
Commercial | Special Mention
Loans
Portfolio loans	76,706	72,447
Commercial | Substandard
Loans
Portfolio loans	19,349	27,903
Commercial | Substandard Non-accrual
Loans
Portfolio loans	10,678	8,523
Commercial real estate
Loans
Portfolio loans	2,920,312	2,892,535
Commercial real estate | Pass
Loans
Portfolio loans	2,446,143	2,393,372
Commercial real estate | Watch
Loans
Portfolio loans	379,546	383,277
Commercial real estate | Special Mention
Loans
Portfolio loans	67,179	75,486
Commercial real estate | Substandard
Loans
Portfolio loans	18,679	34,897
Commercial real estate | Substandard Non-accrual
Loans
Portfolio loans	8,765	5,503
Real estate construction
Loans
Portfolio loans	500,599	461,786
Real estate construction | Pass
Loans
Portfolio loans	482,718	434,681
Real estate construction | Watch
Loans
Portfolio loans	15,473	24,481
Real estate construction | Special Mention
Loans
Portfolio loans	8	77
Real estate construction | Substandard
Loans
Portfolio loans	2,400	2,546
Real estate construction | Substandard Non-accrual
Loans
Portfolio loans		1
Retail Real Estate
Loans
Portfolio loans	1,525,810	1,407,852
Retail Real Estate | Pass
Loans
Portfolio loans	1,496,677	1,382,616
Retail Real Estate | Watch
Loans
Portfolio loans	13,878	10,264
Retail Real Estate | Special Mention
Loans
Portfolio loans	2,342	2,471
Retail Real Estate | Substandard
Loans
Portfolio loans	4,672	3,702
Retail Real Estate | Substandard Non-accrual
Loans
Portfolio loans	8,241	8,799
Retail Other
Loans
Portfolio loans	184,379	37,428
Retail Other | Pass
Loans
Portfolio loans	184,338	37,324
Retail Other | Substandard Non-accrual
Loans
Portfolio loans	41	104
Commercial Loans
Loans
Portfolio loans	2,054,550	2,014,576
Commercial Real Estate Loans
Loans
Portfolio loans	2,920,312	2,892,535
Real Estate Construction
Loans
Portfolio loans	500,599	461,786
Retail Real Estate
Loans
Portfolio loans	1,525,810	1,407,852
Retail Other
Loans
Portfolio loans	$ 184,379	$ 37,428

X

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Amount, before allowance for credit loss, of right to consideration from customer for product sold and service rendered in normal course of business.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=121593590&loc=d3e4428-111522

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