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Loans - Summary of Loan Balances (Detail) - USD ($)
$ in Thousands
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Mortgage loans on real estate:        
Total loans, net of unamortized deferred loan fees and discounts $ 3,015,165 $ 2,759,593 $ 2,522,937  
Consumer:        
Total loans, net of unamortized deferred loan fees and discounts 3,015,165 2,759,593 2,522,937  
Construction:        
Total loans, net of unamortized deferred loan fees and discounts 3,015,165 2,759,593 2,522,937  
Commercial 3,038,472 2,785,312    
Unamortized net deferred loan fees (8,651) (6,916)    
Discounts to principal balance of loans owed, net of charge-offs (14,656) (18,803)    
Total loans, net of unamortized deferred loan fees and discounts 3,015,165 2,759,593 2,522,937  
Noncovered loans 3,015,165 2,756,417    
Covered loans   3,176    
Total loans, net of unamortized deferred loan fees and discounts 3,015,165 2,759,593 2,522,937  
Allowance for loan losses (30,323) (32,503) (36,011) $ (36,585)
Mortgage Loans on Real Estate [Member]        
Mortgage loans on real estate:        
Total loans, net of unamortized deferred loan fees and discounts 2,300,322 2,053,464    
Consumer:        
Total loans, net of unamortized deferred loan fees and discounts 2,300,322 2,053,464    
Construction:        
Total loans, net of unamortized deferred loan fees and discounts 2,300,322 2,053,464    
Total loans, net of unamortized deferred loan fees and discounts 2,300,322 2,053,464    
Total loans, net of unamortized deferred loan fees and discounts 2,300,322 2,053,464    
Consumer [Member]        
Mortgage loans on real estate:        
Total loans, net of unamortized deferred loan fees and discounts 356,874 366,663    
Consumer:        
Total loans, net of unamortized deferred loan fees and discounts 356,874 366,663    
Construction:        
Total loans, net of unamortized deferred loan fees and discounts 356,874 366,663    
Total loans, net of unamortized deferred loan fees and discounts 356,874 366,663    
Total loans, net of unamortized deferred loan fees and discounts 356,874 366,663    
Commercial Portfolio Segment [Member]        
Mortgage loans on real estate:        
Total loans, net of unamortized deferred loan fees and discounts 220,412 217,047    
Consumer:        
Total loans, net of unamortized deferred loan fees and discounts 220,412 217,047    
Construction:        
Total loans, net of unamortized deferred loan fees and discounts 220,412 217,047    
Total loans, net of unamortized deferred loan fees and discounts 220,412 217,047    
Total loans, net of unamortized deferred loan fees and discounts 220,412 217,047    
Construction [Member]        
Mortgage loans on real estate:        
Total loans, net of unamortized deferred loan fees and discounts 137,557 122,419    
Consumer:        
Total loans, net of unamortized deferred loan fees and discounts 137,557 122,419    
Construction:        
Total loans, net of unamortized deferred loan fees and discounts 137,557 122,419    
Total loans, net of unamortized deferred loan fees and discounts 137,557 122,419    
Total loans, net of unamortized deferred loan fees and discounts 137,557 122,419    
Residential 1-4 Family [Member] | Mortgage Loans on Real Estate [Member]        
Mortgage loans on real estate:        
Total loans, net of unamortized deferred loan fees and discounts 385,426 368,343    
Consumer:        
Total loans, net of unamortized deferred loan fees and discounts 385,426 368,343    
Construction:        
Total loans, net of unamortized deferred loan fees and discounts 385,426 368,343    
Total loans, net of unamortized deferred loan fees and discounts 385,426 368,343    
Total loans, net of unamortized deferred loan fees and discounts 385,426 368,343    
Home Equity Loans [Member] | Consumer [Member]        
Mortgage loans on real estate:        
Total loans, net of unamortized deferred loan fees and discounts 43,031 46,182 40,362  
Consumer:        
Total loans, net of unamortized deferred loan fees and discounts 43,031 46,182 40,362  
Construction:        
Total loans, net of unamortized deferred loan fees and discounts 43,031 46,182 40,362  
Total loans, net of unamortized deferred loan fees and discounts 43,031 46,182 40,362  
Total loans, net of unamortized deferred loan fees and discounts 43,031 46,182 40,362  
Allowance for loan losses (1,841) (2,644) (3,177) (1,797)
Other Consumer [Member] | Consumer [Member]        
Mortgage loans on real estate:        
Total loans, net of unamortized deferred loan fees and discounts 25,155 30,766 32,429  
Consumer:        
Total loans, net of unamortized deferred loan fees and discounts 25,155 30,766 32,429  
Construction:        
Total loans, net of unamortized deferred loan fees and discounts 25,155 30,766 32,429  
Total loans, net of unamortized deferred loan fees and discounts 25,155 30,766 32,429  
Total loans, net of unamortized deferred loan fees and discounts 25,155 30,766 32,429  
Allowance for loan losses (586) (622) (688) (719)
Commercial [Member] | Mortgage Loans on Real Estate [Member]        
Mortgage loans on real estate:        
Total loans, net of unamortized deferred loan fees and discounts 1,914,896 1,685,121 1,497,567  
Consumer:        
Total loans, net of unamortized deferred loan fees and discounts 1,914,896 1,685,121 1,497,567  
Construction:        
Total loans, net of unamortized deferred loan fees and discounts 1,914,896 1,685,121 1,497,567  
Total loans, net of unamortized deferred loan fees and discounts 1,914,896 1,685,121 1,497,567  
Total loans, net of unamortized deferred loan fees and discounts 1,914,896 1,685,121 1,497,567  
Allowance for loan losses (11,441) (11,517) (11,015) (9,227)
Commercial [Member] | Construction [Member]        
Mortgage loans on real estate:        
Total loans, net of unamortized deferred loan fees and discounts 69,627 66,990 74,774  
Consumer:        
Total loans, net of unamortized deferred loan fees and discounts 69,627 66,990 74,774  
Construction:        
Total loans, net of unamortized deferred loan fees and discounts 69,627 66,990 74,774  
Total loans, net of unamortized deferred loan fees and discounts 69,627 66,990 74,774  
Total loans, net of unamortized deferred loan fees and discounts 69,627 66,990 74,774  
Allowance for loan losses (642) (680) (812) (411)
Home Equity Lines of Credit [Member] | Consumer [Member]        
Mortgage loans on real estate:        
Total loans, net of unamortized deferred loan fees and discounts 288,688 289,715 322,492  
Consumer:        
Total loans, net of unamortized deferred loan fees and discounts 288,688 289,715 322,492  
Construction:        
Total loans, net of unamortized deferred loan fees and discounts 288,688 289,715 322,492  
Total loans, net of unamortized deferred loan fees and discounts 288,688 289,715 322,492  
Total loans, net of unamortized deferred loan fees and discounts 288,688 289,715 322,492  
Allowance for loan losses (5,800) (7,044) (11,253) (15,676)
Residential [Member] | Mortgage Loans on Real Estate [Member]        
Mortgage loans on real estate:        
Total loans, net of unamortized deferred loan fees and discounts 385,426 368,343 314,265  
Consumer:        
Total loans, net of unamortized deferred loan fees and discounts 385,426 368,343 314,265  
Construction:        
Total loans, net of unamortized deferred loan fees and discounts 385,426 368,343 314,265  
Total loans, net of unamortized deferred loan fees and discounts 385,426 368,343 314,265  
Total loans, net of unamortized deferred loan fees and discounts 385,426 368,343 314,265  
Allowance for loan losses (2,317) (2,748) (2,896) (3,086)
Residential [Member] | Construction [Member]        
Mortgage loans on real estate:        
Total loans, net of unamortized deferred loan fees and discounts 67,930 55,429 46,135  
Consumer:        
Total loans, net of unamortized deferred loan fees and discounts 67,930 55,429 46,135  
Construction:        
Total loans, net of unamortized deferred loan fees and discounts 67,930 55,429 46,135  
Total loans, net of unamortized deferred loan fees and discounts 67,930 55,429 46,135  
Total loans, net of unamortized deferred loan fees and discounts 67,930 55,429 46,135  
Allowance for loan losses (1,184) (1,417) $ (899) $ (1,434)
Originated [Member]        
Mortgage loans on real estate:        
Total loans, net of unamortized deferred loan fees and discounts 2,690,402 2,356,327    
Consumer:        
Total loans, net of unamortized deferred loan fees and discounts 2,690,402 2,356,327    
Construction:        
Total loans, net of unamortized deferred loan fees and discounts 2,690,402 2,356,327    
Commercial 2,699,053 2,363,243    
Unamortized net deferred loan fees (8,651) (6,916)    
Total loans, net of unamortized deferred loan fees and discounts 2,690,402 2,356,327    
Noncovered loans 2,690,402 2,356,327    
Total loans, net of unamortized deferred loan fees and discounts 2,690,402 2,356,327    
Allowance for loan losses (29,122) (28,141)    
Originated [Member] | Mortgage Loans on Real Estate [Member]        
Mortgage loans on real estate:        
Total loans, net of unamortized deferred loan fees and discounts 2,011,032 1,710,367    
Consumer:        
Total loans, net of unamortized deferred loan fees and discounts 2,011,032 1,710,367    
Construction:        
Total loans, net of unamortized deferred loan fees and discounts 2,011,032 1,710,367    
Total loans, net of unamortized deferred loan fees and discounts 2,011,032 1,710,367    
Total loans, net of unamortized deferred loan fees and discounts 2,011,032 1,710,367    
Originated [Member] | Consumer [Member]        
Mortgage loans on real estate:        
Total loans, net of unamortized deferred loan fees and discounts 332,649 332,493    
Consumer:        
Total loans, net of unamortized deferred loan fees and discounts 332,649 332,493    
Construction:        
Total loans, net of unamortized deferred loan fees and discounts 332,649 332,493    
Total loans, net of unamortized deferred loan fees and discounts 332,649 332,493    
Total loans, net of unamortized deferred loan fees and discounts 332,649 332,493    
Originated [Member] | Commercial Portfolio Segment [Member]        
Mortgage loans on real estate:        
Total loans, net of unamortized deferred loan fees and discounts 209,437 200,735    
Consumer:        
Total loans, net of unamortized deferred loan fees and discounts 209,437 200,735    
Construction:        
Total loans, net of unamortized deferred loan fees and discounts 209,437 200,735    
Total loans, net of unamortized deferred loan fees and discounts 209,437 200,735    
Total loans, net of unamortized deferred loan fees and discounts 209,437 200,735    
Originated [Member] | Construction [Member]        
Mortgage loans on real estate:        
Total loans, net of unamortized deferred loan fees and discounts 137,284 112,732    
Consumer:        
Total loans, net of unamortized deferred loan fees and discounts 137,284 112,732    
Construction:        
Total loans, net of unamortized deferred loan fees and discounts 137,284 112,732    
Total loans, net of unamortized deferred loan fees and discounts 137,284 112,732    
Total loans, net of unamortized deferred loan fees and discounts 137,284 112,732    
Originated [Member] | Residential 1-4 Family [Member] | Mortgage Loans on Real Estate [Member]        
Mortgage loans on real estate:        
Total loans, net of unamortized deferred loan fees and discounts 320,522 284,539    
Consumer:        
Total loans, net of unamortized deferred loan fees and discounts 320,522 284,539    
Construction:        
Total loans, net of unamortized deferred loan fees and discounts 320,522 284,539    
Total loans, net of unamortized deferred loan fees and discounts 320,522 284,539    
Total loans, net of unamortized deferred loan fees and discounts 320,522 284,539    
Originated [Member] | Home Equity Loans [Member] | Consumer [Member]        
Mortgage loans on real estate:        
Total loans, net of unamortized deferred loan fees and discounts 39,848 40,736    
Consumer:        
Total loans, net of unamortized deferred loan fees and discounts 39,848 40,736    
Construction:        
Total loans, net of unamortized deferred loan fees and discounts 39,848 40,736    
Total loans, net of unamortized deferred loan fees and discounts 39,848 40,736    
Total loans, net of unamortized deferred loan fees and discounts 39,848 40,736    
Originated [Member] | Other Consumer [Member] | Consumer [Member]        
Mortgage loans on real estate:        
Total loans, net of unamortized deferred loan fees and discounts 22,859 28,167    
Consumer:        
Total loans, net of unamortized deferred loan fees and discounts 22,859 28,167    
Construction:        
Total loans, net of unamortized deferred loan fees and discounts 22,859 28,167    
Total loans, net of unamortized deferred loan fees and discounts 22,859 28,167    
Total loans, net of unamortized deferred loan fees and discounts 22,859 28,167    
Originated [Member] | Commercial [Member] | Mortgage Loans on Real Estate [Member]        
Mortgage loans on real estate:        
Total loans, net of unamortized deferred loan fees and discounts 1,690,510 1,425,828    
Consumer:        
Total loans, net of unamortized deferred loan fees and discounts 1,690,510 1,425,828    
Construction:        
Total loans, net of unamortized deferred loan fees and discounts 1,690,510 1,425,828    
Total loans, net of unamortized deferred loan fees and discounts 1,690,510 1,425,828    
Total loans, net of unamortized deferred loan fees and discounts 1,690,510 1,425,828    
Originated [Member] | Commercial [Member] | Construction [Member]        
Mortgage loans on real estate:        
Total loans, net of unamortized deferred loan fees and discounts 69,364 58,119    
Consumer:        
Total loans, net of unamortized deferred loan fees and discounts 69,364 58,119    
Construction:        
Total loans, net of unamortized deferred loan fees and discounts 69,364 58,119    
Total loans, net of unamortized deferred loan fees and discounts 69,364 58,119    
Total loans, net of unamortized deferred loan fees and discounts 69,364 58,119    
Originated [Member] | Home Equity Lines of Credit [Member] | Consumer [Member]        
Mortgage loans on real estate:        
Total loans, net of unamortized deferred loan fees and discounts 269,942 263,590    
Consumer:        
Total loans, net of unamortized deferred loan fees and discounts 269,942 263,590    
Construction:        
Total loans, net of unamortized deferred loan fees and discounts 269,942 263,590    
Total loans, net of unamortized deferred loan fees and discounts 269,942 263,590    
Total loans, net of unamortized deferred loan fees and discounts 269,942 263,590    
Originated [Member] | Residential [Member] | Construction [Member]        
Mortgage loans on real estate:        
Total loans, net of unamortized deferred loan fees and discounts 67,920 54,613    
Consumer:        
Total loans, net of unamortized deferred loan fees and discounts 67,920 54,613    
Construction:        
Total loans, net of unamortized deferred loan fees and discounts 67,920 54,613    
Total loans, net of unamortized deferred loan fees and discounts 67,920 54,613    
Total loans, net of unamortized deferred loan fees and discounts 67,920 54,613    
PNCI [Member]        
Mortgage loans on real estate:        
Total loans, net of unamortized deferred loan fees and discounts 309,203 378,222    
Consumer:        
Total loans, net of unamortized deferred loan fees and discounts 309,203 378,222    
Construction:        
Total loans, net of unamortized deferred loan fees and discounts 309,203 378,222    
Commercial 316,238 388,139    
Discounts to principal balance of loans owed, net of charge-offs (7,035) (9,917)    
Total loans, net of unamortized deferred loan fees and discounts 309,203 378,222    
Noncovered loans 309,203 378,222    
Total loans, net of unamortized deferred loan fees and discounts 309,203 378,222    
Allowance for loan losses (929) (1,665)    
PNCI [Member] | Mortgage Loans on Real Estate [Member]        
Mortgage loans on real estate:        
Total loans, net of unamortized deferred loan fees and discounts 279,342 328,826    
Consumer:        
Total loans, net of unamortized deferred loan fees and discounts 279,342 328,826    
Construction:        
Total loans, net of unamortized deferred loan fees and discounts 279,342 328,826    
Total loans, net of unamortized deferred loan fees and discounts 279,342 328,826    
Total loans, net of unamortized deferred loan fees and discounts 279,342 328,826    
PNCI [Member] | Consumer [Member]        
Mortgage loans on real estate:        
Total loans, net of unamortized deferred loan fees and discounts 21,197 28,063    
Consumer:        
Total loans, net of unamortized deferred loan fees and discounts 21,197 28,063    
Construction:        
Total loans, net of unamortized deferred loan fees and discounts 21,197 28,063    
Total loans, net of unamortized deferred loan fees and discounts 21,197 28,063    
Total loans, net of unamortized deferred loan fees and discounts 21,197 28,063    
PNCI [Member] | Commercial Portfolio Segment [Member]        
Mortgage loans on real estate:        
Total loans, net of unamortized deferred loan fees and discounts 8,391 12,321    
Consumer:        
Total loans, net of unamortized deferred loan fees and discounts 8,391 12,321    
Construction:        
Total loans, net of unamortized deferred loan fees and discounts 8,391 12,321    
Total loans, net of unamortized deferred loan fees and discounts 8,391 12,321    
Total loans, net of unamortized deferred loan fees and discounts 8,391 12,321    
PNCI [Member] | Construction [Member]        
Mortgage loans on real estate:        
Total loans, net of unamortized deferred loan fees and discounts 273 9,012    
Consumer:        
Total loans, net of unamortized deferred loan fees and discounts 273 9,012    
Construction:        
Total loans, net of unamortized deferred loan fees and discounts 273 9,012    
Total loans, net of unamortized deferred loan fees and discounts 273 9,012    
Total loans, net of unamortized deferred loan fees and discounts 273 9,012    
PNCI [Member] | Residential 1-4 Family [Member] | Mortgage Loans on Real Estate [Member]        
Mortgage loans on real estate:        
Total loans, net of unamortized deferred loan fees and discounts 63,519 82,335    
Consumer:        
Total loans, net of unamortized deferred loan fees and discounts 63,519 82,335    
Construction:        
Total loans, net of unamortized deferred loan fees and discounts 63,519 82,335    
Total loans, net of unamortized deferred loan fees and discounts 63,519 82,335    
Total loans, net of unamortized deferred loan fees and discounts 63,519 82,335    
PNCI [Member] | Home Equity Loans [Member] | Consumer [Member]        
Mortgage loans on real estate:        
Total loans, net of unamortized deferred loan fees and discounts 2,698 3,764    
Consumer:        
Total loans, net of unamortized deferred loan fees and discounts 2,698 3,764    
Construction:        
Total loans, net of unamortized deferred loan fees and discounts 2,698 3,764    
Total loans, net of unamortized deferred loan fees and discounts 2,698 3,764    
Total loans, net of unamortized deferred loan fees and discounts 2,698 3,764    
PNCI [Member] | Other Consumer [Member] | Consumer [Member]        
Mortgage loans on real estate:        
Total loans, net of unamortized deferred loan fees and discounts 2,251 2,534    
Consumer:        
Total loans, net of unamortized deferred loan fees and discounts 2,251 2,534    
Construction:        
Total loans, net of unamortized deferred loan fees and discounts 2,251 2,534    
Total loans, net of unamortized deferred loan fees and discounts 2,251 2,534    
Total loans, net of unamortized deferred loan fees and discounts 2,251 2,534    
PNCI [Member] | Commercial [Member] | Mortgage Loans on Real Estate [Member]        
Mortgage loans on real estate:        
Total loans, net of unamortized deferred loan fees and discounts 215,823 246,491    
Consumer:        
Total loans, net of unamortized deferred loan fees and discounts 215,823 246,491    
Construction:        
Total loans, net of unamortized deferred loan fees and discounts 215,823 246,491    
Total loans, net of unamortized deferred loan fees and discounts 215,823 246,491    
Total loans, net of unamortized deferred loan fees and discounts 215,823 246,491    
PNCI [Member] | Commercial [Member] | Construction [Member]        
Mortgage loans on real estate:        
Total loans, net of unamortized deferred loan fees and discounts 263 8,871    
Consumer:        
Total loans, net of unamortized deferred loan fees and discounts 263 8,871    
Construction:        
Total loans, net of unamortized deferred loan fees and discounts 263 8,871    
Total loans, net of unamortized deferred loan fees and discounts 263 8,871    
Total loans, net of unamortized deferred loan fees and discounts 263 8,871    
PNCI [Member] | Home Equity Lines of Credit [Member] | Consumer [Member]        
Mortgage loans on real estate:        
Total loans, net of unamortized deferred loan fees and discounts 16,248 21,765    
Consumer:        
Total loans, net of unamortized deferred loan fees and discounts 16,248 21,765    
Construction:        
Total loans, net of unamortized deferred loan fees and discounts 16,248 21,765    
Total loans, net of unamortized deferred loan fees and discounts 16,248 21,765    
Total loans, net of unamortized deferred loan fees and discounts 16,248 21,765    
PNCI [Member] | Residential [Member] | Construction [Member]        
Mortgage loans on real estate:        
Total loans, net of unamortized deferred loan fees and discounts 10 141    
Consumer:        
Total loans, net of unamortized deferred loan fees and discounts 10 141    
Construction:        
Total loans, net of unamortized deferred loan fees and discounts 10 141    
Total loans, net of unamortized deferred loan fees and discounts 10 141    
Total loans, net of unamortized deferred loan fees and discounts 10 141    
PCI - Cash Basis [Member]        
Mortgage loans on real estate:        
Total loans, net of unamortized deferred loan fees and discounts 2,069 2,983    
Consumer:        
Total loans, net of unamortized deferred loan fees and discounts 2,069 2,983    
Construction:        
Total loans, net of unamortized deferred loan fees and discounts 2,069 2,983    
Commercial 5,863 8,280    
Discounts to principal balance of loans owed, net of charge-offs (3,794) (5,297)    
Total loans, net of unamortized deferred loan fees and discounts 2,069 2,983    
Noncovered loans 2,069 2,983    
Total loans, net of unamortized deferred loan fees and discounts 2,069 2,983    
Allowance for loan losses (17) (17)    
PCI - Cash Basis [Member] | Consumer [Member]        
Mortgage loans on real estate:        
Total loans, net of unamortized deferred loan fees and discounts 2,069 2,983    
Consumer:        
Total loans, net of unamortized deferred loan fees and discounts 2,069 2,983    
Construction:        
Total loans, net of unamortized deferred loan fees and discounts 2,069 2,983    
Total loans, net of unamortized deferred loan fees and discounts 2,069 2,983    
Total loans, net of unamortized deferred loan fees and discounts 2,069 2,983    
PCI - Cash Basis [Member] | Home Equity Lines of Credit [Member] | Consumer [Member]        
Mortgage loans on real estate:        
Total loans, net of unamortized deferred loan fees and discounts 2,069 2,983    
Consumer:        
Total loans, net of unamortized deferred loan fees and discounts 2,069 2,983    
Construction:        
Total loans, net of unamortized deferred loan fees and discounts 2,069 2,983    
Total loans, net of unamortized deferred loan fees and discounts 2,069 2,983    
Total loans, net of unamortized deferred loan fees and discounts 2,069 2,983    
PCI - Other [Member]        
Mortgage loans on real estate:        
Total loans, net of unamortized deferred loan fees and discounts 13,491 22,061    
Consumer:        
Total loans, net of unamortized deferred loan fees and discounts 13,491 22,061    
Construction:        
Total loans, net of unamortized deferred loan fees and discounts 13,491 22,061    
Commercial 17,318 25,650    
Discounts to principal balance of loans owed, net of charge-offs (3,827) (3,589)    
Total loans, net of unamortized deferred loan fees and discounts 13,491 22,061    
Noncovered loans 13,491 18,885    
Covered loans   3,176    
Total loans, net of unamortized deferred loan fees and discounts 13,491 22,061    
Allowance for loan losses (255) (2,680)    
PCI - Other [Member] | Mortgage Loans on Real Estate [Member]        
Mortgage loans on real estate:        
Total loans, net of unamortized deferred loan fees and discounts 9,948 14,271    
Consumer:        
Total loans, net of unamortized deferred loan fees and discounts 9,948 14,271    
Construction:        
Total loans, net of unamortized deferred loan fees and discounts 9,948 14,271    
Total loans, net of unamortized deferred loan fees and discounts 9,948 14,271    
Total loans, net of unamortized deferred loan fees and discounts 9,948 14,271    
PCI - Other [Member] | Consumer [Member]        
Mortgage loans on real estate:        
Total loans, net of unamortized deferred loan fees and discounts 959 3,124    
Consumer:        
Total loans, net of unamortized deferred loan fees and discounts 959 3,124    
Construction:        
Total loans, net of unamortized deferred loan fees and discounts 959 3,124    
Total loans, net of unamortized deferred loan fees and discounts 959 3,124    
Total loans, net of unamortized deferred loan fees and discounts 959 3,124    
PCI - Other [Member] | Commercial Portfolio Segment [Member]        
Mortgage loans on real estate:        
Total loans, net of unamortized deferred loan fees and discounts 2,584 3,991    
Consumer:        
Total loans, net of unamortized deferred loan fees and discounts 2,584 3,991    
Construction:        
Total loans, net of unamortized deferred loan fees and discounts 2,584 3,991    
Total loans, net of unamortized deferred loan fees and discounts 2,584 3,991    
Total loans, net of unamortized deferred loan fees and discounts 2,584 3,991    
PCI - Other [Member] | Construction [Member]        
Mortgage loans on real estate:        
Total loans, net of unamortized deferred loan fees and discounts   675    
Consumer:        
Total loans, net of unamortized deferred loan fees and discounts   675    
Construction:        
Total loans, net of unamortized deferred loan fees and discounts   675    
Total loans, net of unamortized deferred loan fees and discounts   675    
Total loans, net of unamortized deferred loan fees and discounts   675    
PCI - Other [Member] | Residential 1-4 Family [Member] | Mortgage Loans on Real Estate [Member]        
Mortgage loans on real estate:        
Total loans, net of unamortized deferred loan fees and discounts 1,385 1,469    
Consumer:        
Total loans, net of unamortized deferred loan fees and discounts 1,385 1,469    
Construction:        
Total loans, net of unamortized deferred loan fees and discounts 1,385 1,469    
Total loans, net of unamortized deferred loan fees and discounts 1,385 1,469    
Total loans, net of unamortized deferred loan fees and discounts 1,385 1,469    
PCI - Other [Member] | Home Equity Loans [Member] | Consumer [Member]        
Mortgage loans on real estate:        
Total loans, net of unamortized deferred loan fees and discounts 485 1,682    
Consumer:        
Total loans, net of unamortized deferred loan fees and discounts 485 1,682    
Construction:        
Total loans, net of unamortized deferred loan fees and discounts 485 1,682    
Total loans, net of unamortized deferred loan fees and discounts 485 1,682    
Total loans, net of unamortized deferred loan fees and discounts 485 1,682    
PCI - Other [Member] | Other Consumer [Member] | Consumer [Member]        
Mortgage loans on real estate:        
Total loans, net of unamortized deferred loan fees and discounts 45 65    
Consumer:        
Total loans, net of unamortized deferred loan fees and discounts 45 65    
Construction:        
Total loans, net of unamortized deferred loan fees and discounts 45 65    
Total loans, net of unamortized deferred loan fees and discounts 45 65    
Total loans, net of unamortized deferred loan fees and discounts 45 65    
PCI - Other [Member] | Commercial [Member] | Mortgage Loans on Real Estate [Member]        
Mortgage loans on real estate:        
Total loans, net of unamortized deferred loan fees and discounts 8,563 12,802    
Consumer:        
Total loans, net of unamortized deferred loan fees and discounts 8,563 12,802    
Construction:        
Total loans, net of unamortized deferred loan fees and discounts 8,563 12,802    
Total loans, net of unamortized deferred loan fees and discounts 8,563 12,802    
Total loans, net of unamortized deferred loan fees and discounts 8,563 12,802    
PCI - Other [Member] | Home Equity Lines of Credit [Member] | Consumer [Member]        
Mortgage loans on real estate:        
Total loans, net of unamortized deferred loan fees and discounts 429 1,377    
Consumer:        
Total loans, net of unamortized deferred loan fees and discounts 429 1,377    
Construction:        
Total loans, net of unamortized deferred loan fees and discounts 429 1,377    
Total loans, net of unamortized deferred loan fees and discounts 429 1,377    
Total loans, net of unamortized deferred loan fees and discounts $ 429 1,377    
PCI - Other [Member] | Residential [Member] | Construction [Member]        
Mortgage loans on real estate:        
Total loans, net of unamortized deferred loan fees and discounts   675    
Consumer:        
Total loans, net of unamortized deferred loan fees and discounts   675    
Construction:        
Total loans, net of unamortized deferred loan fees and discounts   675    
Total loans, net of unamortized deferred loan fees and discounts   675    
Total loans, net of unamortized deferred loan fees and discounts   $ 675