Summary of Significant Accounting Policies - Additional Information (Detail)	12 Months Ended		0 Months Ended
	Dec. 31, 2014 community Office segment	Dec. 31, 2013	Jan. 01, 2015 Office
Summary Of Significant Accounting Policies [Line Items]
Number of reportable segments (in segments)	3
Number of banking offices (in offices)	31
Number of retirement communities with banking and trust services (in communities)	12
Number of days loan or lease past due for nonaccrual of interest status	90 days
Maximum stock issuable under Univest Dividend Reinvestment Plan	1,968,750
Stock issued under Univest dividend reinvestment plan	82,922	95,639
Shares available for future purchase under Univest dividend reinvestment plan	552,181
Maximum stock issuable under employees stock purchase plan	2,000,000
Nineteen Ninety Six 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%
Employee Stock Purchase Plan, Percentage of Purchase Price of Stock Based on closing price on Last Trading Day of Each Quarter End	90.00%
Maximum discount from fair value to recognize compensation expense for employee stock purchase plan	5.00%
Stock issued under employee stock purchase plans	23,271	20,195
Shares available for future purchase under employee stock purchase plans	732,624
Minimum [Member]
Summary Of Significant Accounting Policies [Line Items]
Period Optioned Shares Begin To Become Exercisable	3 years
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
Maximum [Member]
Summary Of Significant Accounting Policies [Line Items]
Period Optioned Shares Begin To Become Exercisable	10 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
Building [Member]
Summary Of Significant Accounting Policies [Line Items]
Premises and Equipment estimated useful lives	40 years
Building [Member] | Maximum [Member]
Summary Of Significant Accounting Policies [Line Items]
Premises and Equipment estimated useful lives	40 years
Land Improvements [Member] | Maximum [Member]
Summary Of Significant Accounting Policies [Line Items]
Premises and Equipment estimated useful lives	15 years
Furniture, Fixtures and Equipment [Member] | Minimum [Member]
Summary Of Significant Accounting Policies [Line Items]
Premises and Equipment estimated useful lives	3 years
Furniture, Fixtures and Equipment [Member] | Maximum [Member]
Summary Of Significant Accounting Policies [Line Items]
Premises and Equipment estimated useful lives	10 years
Restricted Stock [Member]
Summary Of Significant Accounting Policies [Line Items]
Period Optioned Shares Begin To Become Exercisable	3 years
Subsequent Event [Member]
Summary Of Significant Accounting Policies [Line Items]
Number of banking offices operated in greater Philadelphia marketplace (in offices)			3