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Network
2419402 - Disclosure - Accumulated Other Comprehensive Income Balances Of Each Component Of Accumulated Other Comprehensive Income, Net Of Tax (Details)
(http://www.invtitle.com/role/AccumulatedOtherComprehensiveIncomeBalancesOfEachComponentOfAccumulatedOtherComprehensiveIncomeNetOfTaxDetails)
TableAccumulated Other Comprehensive Income Loss
Slicers (applies to each fact value in each table cell)
Reporting Entity [Axis]0000720858 (http://www.sec.gov/CIK)
Accumulated Other Comprehensive Income Loss [Line Items]Period [Axis]
2016-01-01 - 2016-12-31
2015-01-01 - 2015-12-31
2014-01-01 - 2014-12-31
Statement, Equity Components [Axis]Statement, Equity Components [Axis]Statement, Equity Components [Axis]
Unrealized Gains And Losses On Available-For-Sale SecuritiesPostretirement Benefits PlansEquity Component [Domain]Unrealized Gains And Losses On Available-For-Sale SecuritiesPostretirement Benefits PlansEquity Component [Domain]Unrealized Gains And Losses On Available-For-Sale SecuritiesPostretirement Benefits PlansEquity Component [Domain]
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
 
 
 
 
 
 
 
 
 
Beginning balance
11,597,741  
(114,726) 
11,483,015  
12,934,497  
(77,988) 
12,856,509  
11,395,757  
(48,353) 
11,347,404  
Other comprehensive income (loss) before reclassifications
758,021  
(374) 
757,647  
(1,355,316) 
(41,954) 
(1,397,270) 
1,874,111  
(31,100) 
1,843,011  
Amounts reclassified from accumulated other comprehensive income
(485,115) 
5,900  
(479,215) 
18,560  
5,216  
23,776  
(335,371) 
1,465  
(333,906) 
Other comprehensive income (loss)
272,906  
 
5,526  
 
278,432  
 
(1,336,756) 
 
(36,738) 
 
(1,373,494) 
 
1,538,740  
 
(29,635) 
 
1,509,105  
 
Ending balance
11,870,647  
 
(109,200) 
 
11,761,447  
 
11,597,741  
 
(114,726) 
 
11,483,015  
 
12,934,497  
 
(77,988) 
 
12,856,509