Annual report pursuant to Section 13 and 15(d)

Premises and Equipment - Summary of Major Components of Premises and Equipment (Detail)

v3.6.0.2
Premises and Equipment - Summary of Major Components of Premises and Equipment (Detail) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Property, Plant and Equipment [Line Items]      
Premises and equipment, gross $ 60,444 $ 60,272  
Accumulated depreciation and amortization (31,383) (30,075)  
Impairment reserve (363) (363)  
Total premises and equipment, net 28,698 29,834  
Depreciation and amortization expense 2,900 3,100 $ 2,200
Software [Member]      
Property, Plant and Equipment [Line Items]      
Premises and equipment, gross 880 0  
Land [Member]      
Property, Plant and Equipment [Line Items]      
Premises and equipment, gross 8,750 9,810  
Buildings and improvements [Member]      
Property, Plant and Equipment [Line Items]      
Premises and equipment, gross 18,313 19,455  
Furniture and equipment [Member]      
Property, Plant and Equipment [Line Items]      
Premises and equipment, gross 20,668 19,711  
Leasehold improvements [Member]      
Property, Plant and Equipment [Line Items]      
Premises and equipment, gross $ 11,833 $ 11,296