Rendering

Component: (Network and Table)
Network
42102 - Disclosure - Fair Value Measurements -(Reconciliation) (Details)
(http://www.ibc.com/role/DisclosureFairValueMeasurementsReconciliationDetails)
TableFair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table]
Slicers (applies to each fact value in each table cell)
Reporting Entity [Axis]0000315709 (http://www.sec.gov/CIK)
Asset Class [Axis]Residential mortgage-backed securities
Fair Value, Assets Measured on Recurring Basis, mortgage-backed securities reconciliationPeriod [Axis]
2016-01-01 - 2016-12-31
Reconciliation of activity for mortgage-backed securities on a net basis
 
Balance at the beginning of the period
21,229,000  
Principal paydowns
(4,417,000) 
Total unrealized losses included in:
 
Other comprehensive loss
1,147,000  
Impairment realized in earnings
(354,000) 
Balance at the end of the period
17,605,000