Loans and Leases - Aging Analysis of Past Due Payments for Each Loan Portfolio Segment (Details) - USD ($)	3 Months Ended
Mar. 31, 2016	Mar. 31, 2015	Dec. 31, 2015
Aging analysis of past due payments for each loan portfolio segment [Abstract]
Non-accrual	$ 5,224,000		$ 5,492,000
Current	522,751,000		490,265,000
Total	531,147,000	$ 418,686,000	499,103,000
Interest income lost on non-accrual loans		204,000
Financing Receivables, 30 to 59 Days Past Due [Member]
Aging analysis of past due payments for each loan portfolio segment [Abstract]
Financing Receivable, Recorded Investment, Past Due	2,859,000		2,556,000
Financing Receivables, 60 to 89 Days Past Due [Member]
Aging analysis of past due payments for each loan portfolio segment [Abstract]
Financing Receivable, Recorded Investment, Past Due	313,000		790,000
Commercial real estate [Member]
Aging analysis of past due payments for each loan portfolio segment [Abstract]
Non-accrual	1,396,000		1,495,000
Current	235,947,000		224,088,000
Total	237,343,000	194,277,000	225,679,000
Commercial real estate [Member] \| Financing Receivables, 30 to 59 Days Past Due [Member]
Aging analysis of past due payments for each loan portfolio segment [Abstract]
Financing Receivable, Recorded Investment, Past Due			96,000
Construction and land development [Member]
Aging analysis of past due payments for each loan portfolio segment [Abstract]
Non-accrual	145,000		145,000
Current	60,950,000		47,332,000
Total	61,095,000	18,610,000	47,984,000
Construction and land development [Member] \| Financing Receivables, 30 to 59 Days Past Due [Member]
Aging analysis of past due payments for each loan portfolio segment [Abstract]
Financing Receivable, Recorded Investment, Past Due			507,000
Commercial and industrial [Member]
Aging analysis of past due payments for each loan portfolio segment [Abstract]
Non-accrual	821,000		751,000
Current	90,120,000		83,727,000
Total	92,189,000	83,240,000	85,980,000
Commercial and industrial [Member] \| Financing Receivables, 30 to 59 Days Past Due [Member]
Aging analysis of past due payments for each loan portfolio segment [Abstract]
Financing Receivable, Recorded Investment, Past Due	1,190,000		910,000
Commercial and industrial [Member] \| Financing Receivables, 60 to 89 Days Past Due [Member]
Aging analysis of past due payments for each loan portfolio segment [Abstract]
Financing Receivable, Recorded Investment, Past Due	58,000		592,000
Multi-family [Member]
Aging analysis of past due payments for each loan portfolio segment [Abstract]
Current	16,576,000		16,249,000
Total	16,576,000	17,594,000	16,249,000
Residential real estate [Member]
Aging analysis of past due payments for each loan portfolio segment [Abstract]
Non-accrual	843,000		889,000
Current	47,313,000		49,816,000
Total	49,370,000	43,416,000	51,588,000
Residential real estate [Member] \| Financing Receivables, 30 to 59 Days Past Due [Member]
Aging analysis of past due payments for each loan portfolio segment [Abstract]
Financing Receivable, Recorded Investment, Past Due	1,059,000		724,000
Residential real estate [Member] \| Financing Receivables, 60 to 89 Days Past Due [Member]
Aging analysis of past due payments for each loan portfolio segment [Abstract]
Financing Receivable, Recorded Investment, Past Due	155,000		159,000
Leases [Member]
Aging analysis of past due payments for each loan portfolio segment [Abstract]
Non-accrual	981,000		1,087,000
Current	65,576,000		62,896,000
Total	67,267,000	53,473,000	64,341,000
Leases [Member] \| Financing Receivables, 30 to 59 Days Past Due [Member]
Aging analysis of past due payments for each loan portfolio segment [Abstract]
Financing Receivable, Recorded Investment, Past Due	610,000		319,000
Leases [Member] \| Financing Receivables, 60 to 89 Days Past Due [Member]
Aging analysis of past due payments for each loan portfolio segment [Abstract]
Financing Receivable, Recorded Investment, Past Due	100,000		39,000
Tax certificates [Member]
Aging analysis of past due payments for each loan portfolio segment [Abstract]
Non-accrual	1,038,000		1,125,000
Current	3,782,000		3,630,000
Total	4,820,000	5,608,000	4,755,000
Consumer [Member]
Aging analysis of past due payments for each loan portfolio segment [Abstract]
Current	2,487,000		2,527,000
Total	2,487,000	$ 2,468,000	$ 2,527,000
Royal Bancshares [Member]
Aging analysis of past due payments for each loan portfolio segment [Abstract]
Interest income lost on non-accrual loans	$ 158,000

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Financing receivables that are current.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 7A
-URI http://asc.fasb.org/extlink&oid=49124121&loc=SL6953401-111524

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Recorded investment in financing receivables that are on nonaccrual status as of the balance sheet date.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 7
-Subparagraph (d)
-URI http://asc.fasb.org/extlink&oid=49124121&loc=d3e5111-111524

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Recorded Investment in financing receivables that are past due at the balance sheet date.

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Reflects the amount of additional interest income that would have been recorded if impaired or nonperforming loans were instead current, in compliance with their original terms, and outstanding throughout the reporting period or since origination (if held for part of the period).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 40
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=25495931&loc=d3e18794-111554

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Amount before allowance and after deduction of deferred interest and fees, unamortized costs and premiums and discounts from face amounts, of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Excludes loans and leases covered under loss sharing agreements.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=28367877&loc=d3e4428-111522

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-Publisher FASB
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-Section 50
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-URI http://asc.fasb.org/extlink&oid=49124121&loc=d3e5074-111524

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