Credit Quality Assessment (Credit Quality of Loan Portfolio by Segment) (Detail) (USD $)	Dec. 31, 2014	Dec. 31, 2013
Financing Receivable Recorded Investment [Line Items]
Non-accrual loans and leases	$ 28,530,000	$ 30,574,000
Loans and leases 90 days past due		1,000
Restructured loans and leases	5,497,000	9,459,000
Total non-performing loans and leases	34,027,000	40,034,000
Other real estate owned	3,195,000us-gaap_ForeclosedAssets	1,338,000us-gaap_ForeclosedAssets
Total non-performing assets	37,222,000sasr_NonperformingAssets	41,372,000sasr_NonperformingAssets
Commercial
Financing Receivable Recorded Investment [Line Items]
Non-accrual loans and leases	3,184,000	3,400,000
Loans and leases 90 days past due		0
Restructured loans and leases	710,000	2,207,000
Total non-performing loans and leases	3,894,000	5,607,000
Other real estate owned	39,000	54,000
Total non-performing assets	3,933,000	5,661,000
Leases
Financing Receivable Recorded Investment [Line Items]
Non-accrual loans and leases	0	0
Loans and leases 90 days past due		0
Restructured loans and leases	0	0
Total non-performing loans and leases	0	0
Other real estate owned	0	0
Total non-performing assets	0	0
Consumer
Financing Receivable Recorded Investment [Line Items]
Non-accrual loans and leases	1,668,000	2,259,000
Loans and leases 90 days past due		1,000
Restructured loans and leases	0	29,000
Total non-performing loans and leases	1,668,000	2,289,000
Other real estate owned	0	0
Total non-performing assets	1,668,000	2,289,000
Commercial Real Estate Portfolio Segment \| Commercial Acquisition, Development and Construction
Financing Receivable Recorded Investment [Line Items]
Non-accrual loans and leases	2,464,000	4,127,000
Loans and leases 90 days past due		0
Restructured loans and leases	0	0
Total non-performing loans and leases	2,464,000	4,127,000
Other real estate owned	365,000	365,000
Total non-performing assets	2,829,000	4,492,000
Commercial Real Estate Portfolio Segment \| Commercial Investor Real Estate
Financing Receivable Recorded Investment [Line Items]
Non-accrual loans and leases	8,156,000	6,802,000
Loans and leases 90 days past due		0
Restructured loans and leases	2,123,000	852,000
Total non-performing loans and leases	10,279,000	7,654,000
Other real estate owned	0	0
Total non-performing assets	10,279,000	7,654,000
Commercial Real Estate Portfolio Segment \| Commercial Owner Occupied Real Estate
Financing Receivable Recorded Investment [Line Items]
Non-accrual loans and leases	8,941,000	5,936,000
Loans and leases 90 days past due		0
Restructured loans and leases	0	1,174,000
Total non-performing loans and leases	8,941,000	7,110,000
Other real estate owned	0	0
Total non-performing assets	8,941,000	7,110,000
Residential Real Estate Portfolio Segment \| Residential Mortgage
Financing Receivable Recorded Investment [Line Items]
Non-accrual loans and leases	3,012,000	5,735,000
Loans and leases 90 days past due		0
Restructured loans and leases	2,664,000	5,197,000
Total non-performing loans and leases	5,676,000	10,932,000
Other real estate owned	1,408,000	919,000
Total non-performing assets	7,084,000	11,851,000
Residential Real Estate Portfolio Segment \| Residential Construction
Financing Receivable Recorded Investment [Line Items]
Non-accrual loans and leases	1,105,000	2,315,000
Loans and leases 90 days past due		0
Restructured loans and leases	0	0
Total non-performing loans and leases	1,105,000	2,315,000
Other real estate owned	1,383,000	0
Total non-performing assets	$ 2,488,000	$ 2,315,000

Financing Receivable, Recorded Investment, Nonperforming

No definition available.

Name:	sasr_FinancingReceivableRecordedInvestmentNonperforming
Namespace Prefix:	sasr_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Nonperforming Assets

+ References

No definition available.

+ Details

Name:	sasr_NonperformingAssets
Namespace Prefix:	sasr_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

The amount of the outstanding recorded investment related to financing receivables that have been modified by troubled debt restructurings.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

-SubTopic 40

-Section 50

-Paragraph 4

-URI http://asc.fasb.org/extlink&oid=25495931&loc=d3e18845-111554

+ Details

Name:	us-gaap_FinancingReceivableModificationsRecordedInvestment
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Recorded investment in financing receivables that are 90 days or more past due and still accruing.

+ 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=35738203&loc=d3e5111-111524

+ Details

Name:	us-gaap_FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruing
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

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

+ References

+ Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Carrying amount as of the balance sheet date of all assets obtained in full or partial satisfaction of a debt arrangement through foreclosure proceedings or defeasance; includes real and personal property; equity interests in corporations, partnerships, and joint ventures; and beneficial interests in trusts.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

-SubTopic 10

-Section 45

-Paragraph 3

-URI http://asc.fasb.org/extlink&oid=28367877&loc=d3e4437-111522

+ Details

Name:	us-gaap_ForeclosedAssets
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Details

Name:	sasr_FinancingReceivablesInformationByPortfolioSegmentsAxis=sasr_ResidentialRealEstatePortfolioSegmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	sasr_FinancingReceivablesInformationByPortfolioSegmentsAxis=us-gaap_CommercialRealEstatePortfolioSegmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=us-gaap_CommercialLoanMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=us-gaap_ConsumerLoanMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=us-gaap_FinanceLeasesFinancingReceivableMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: