XML 152 R141.htm IDEA: XBRL DOCUMENT v3.7.0.1
Federal Home Loan Bank Advances - Summary of FHLB Advances (Detail) - USD ($)
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2016
Dec. 31, 2015
Sep. 30, 2016
Jun. 30, 2016
Mar. 31, 2016
Sep. 30, 2015
Jun. 30, 2015
Mar. 31, 2015
Federal Home Loan Banks [Abstract]                    
Weighted-average interest rate 0.00% 0.30% 0.49% 0.30%            
Average balance     $ 24,375,000 $ 89,512,000            
Total interest expense     122,000 275,000            
Maximum daily amount outstanding $ 201,130,000 $ 196,100,000 201,130,000 196,100,000            
Carrying value 0 183,000,000 0 183,000,000 $ 0 $ 0 $ 0 $ 183,000,000 $ 138,400,000 $ 0
Mortgage-backed securities 0 8,720,000 0 8,720,000            
Mortgage loans acquired for sale at fair value 0 63,993,000 0 63,993,000            
Mortgage loans at fair value $ 0 $ 134,172,000 $ 0 $ 134,172,000