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1121 - Disclosure - Fair Value - Securities Available for Sale Measured at Fair Value on Recurring Basis Using Significant Unobservable Inputs (Level 3) (Detail)
(http://www.progbank.com/taxonomy/role/DisclosureFairValueSecuritiesAvailableForSaleMeasuredAtFairValueOnRecurringBasisUsingSignificantUnobservableInputsLevel3)
TableFair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table]
Slicers (applies to each fact value in each table cell)
Reporting Entity [Axis]0000736772 (http://www.sec.gov/CIK)
Asset Class [Axis]Pooled Trust Preferred [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]Period [Axis]
2016-01-01 - 2016-12-31
2015-01-01 - 2015-12-31
Beginning Balance
3,413,000  
905,000  
Total gains or (losses):
 
 
Included in other comprehensive income (loss)
(442,000) 
2,508,000  
Included in realized gains on available-for-sale securities
 
0  
Sale of available-for-sale securities
(922,000) 
0  
Ending Balance
2,049,000  
 
3,413,000