Summary of Significant Accounting Policies - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2013 Communities_ Bank Office	Dec. 31, 2012
Summary Of Significant Accounting Policies [Line Items]
Number of reportable segment	1
Number of banking offices	31
Number of retirement communities with banking and trust services	12
Maturity period of interest-earning deposits with other banks	Less than 3 months
Number of days loan or lease past due for nonaccrual of interest status	90 days
Stock issued under Univest dividend reinvestment plan	95,639	103,807
Maximum stock issuable under Univest Dividend Reinvestment Plan	1,968,750
Shares available for future purchase under Univest dividend reinvestment plan	635,103
Trust preferred securities, settlement date	Jul. 08, 2013
Building [Member]
Summary Of Significant Accounting Policies [Line Items]
Premises and Equipment estimated useful lives	40 years
Building on Leased Land [Member]
Summary Of Significant Accounting Policies [Line Items]
Premises and Equipment estimated useful lives	40 years
Estimated useful life	Lesser of forty years or the term of the lease
Land Improvements [Member]
Summary Of Significant Accounting Policies [Line Items]
Premises and Equipment estimated useful lives	15 years
Estimated useful life	Fifteen years or the term of the lease
1996 Employee Stock Purchase Plan [Member]
Summary Of Significant Accounting Policies [Line Items]
Maximum stock issuable under employees stock purchase plan	984,375
Minimum employees contributions to the purchase plan	2.00%
Maximum employees contributions to the purchase plan	10.00%
Maximum discount from fair value to recognize compensation expense for employee stock purchase plan	5.00%
Stock issued under employee stock purchase plans	20,195	20,933
Shares available for future purchase under employee stock purchase plans	755,895
Minimum [Member] | Customer Related [Member]
Summary Of Significant Accounting Policies [Line Items]
Intangibles and other identified intangibles with finite useful lives	5 years
Minimum [Member] | Noncompete Agreements [Member]
Summary Of Significant Accounting Policies [Line Items]
Intangibles and other identified intangibles with finite useful lives	3 years
Minimum [Member] | Furniture, Fixtures and Equipment [Member]
Summary Of Significant Accounting Policies [Line Items]
Premises and Equipment estimated useful lives	3 years
Maximum [Member] | Core Deposits and Other Intangible Assets [Member]
Summary Of Significant Accounting Policies [Line Items]
Intangibles and other identified intangibles with finite useful lives	15 years
Maximum [Member] | Customer Related [Member]
Summary Of Significant Accounting Policies [Line Items]
Intangibles and other identified intangibles with finite useful lives	12 years
Maximum [Member] | Noncompete Agreements [Member]
Summary Of Significant Accounting Policies [Line Items]
Intangibles and other identified intangibles with finite useful lives	5 years
Maximum [Member] | Furniture, Fixtures and Equipment [Member]
Summary Of Significant Accounting Policies [Line Items]
Premises and Equipment estimated useful lives	10 years