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FAIR VALUE MEASUREMENTS - Rollforward on Recurring Basis (Detail) - Fair Value, Measurements, Recurring [Member] - USD ($)
$ in Thousands
6 Months Ended 12 Months Ended
Jun. 30, 2017
Dec. 31, 2016
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Balance at beginning of period $ 1,386 $ 1,623
Total gains (losses) – realized/unrealized:    
Included in earnings 4 0
Included in other comprehensive income 80 46
Accretion included in earnings 0 6
Purchases, issuances, sales and settlements:    
Purchases 17,485 0
Issuances 0 0
Sales/redemptions (12,921) 0
Settlements (1,271) (289)
Transfers from Level 3 (578) 0
Transfers into Level 3 1,252 0
Balance at end of period 5,437 1,386
Other Debt Securities [Member]    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Balance at beginning of period 0 0
Total gains (losses) – realized/unrealized:    
Included in earnings 0 0
Included in other comprehensive income 0 0
Accretion included in earnings (1) 0
Purchases, issuances, sales and settlements:    
Purchases 12,048 0
Issuances 0 0
Sales/redemptions (12,047) 0
Settlements 0 0
Transfers from Level 3 0 0
Transfers into Level 3 0 0
Balance at end of period 0 0
Equity Securities [Member]    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Balance at beginning of period 492 439
Total gains (losses) – realized/unrealized:    
Included in earnings 0 0
Included in other comprehensive income 86 53
Accretion included in earnings 0 0
Purchases, issuances, sales and settlements:    
Purchases 0 0
Issuances 0 0
Sales/redemptions 0 0
Settlements 0 0
Transfers from Level 3 (578) 0
Transfers into Level 3 0 0
Balance at end of period 0 492
Residential Non-Agency Collateralized Mortgage Obligations [Member]    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Balance at beginning of period 894 1,184
Total gains (losses) – realized/unrealized:    
Included in earnings 4 0
Included in other comprehensive income (6) (7)
Accretion included in earnings 1 6
Purchases, issuances, sales and settlements:    
Purchases 0 0
Issuances 0 0
Sales/redemptions (874) 0
Settlements (19) (289)
Transfers from Level 3 0 0
Transfers into Level 3 0 0
Balance at end of period 0 894
Interest Rate Lock Commitments [Member]    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Balance at beginning of period 0 0
Total gains (losses) – realized/unrealized:    
Included in earnings 0 0
Included in other comprehensive income 0 0
Accretion included in earnings 0 0
Purchases, issuances, sales and settlements:    
Purchases 5,437 0
Issuances 0 0
Sales/redemptions 0 0
Settlements (1,252) 0
Transfers from Level 3 0 0
Transfers into Level 3 1,252 0
Balance at end of period $ 5,437 $ 0