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Network
2414402 - Disclosure - Other Comprehensive Income - Components of accumulated other comprehensive income (Details)
(http://www.archcapgroup.com/role/OtherComprehensiveIncomeComponentsOfAccumulatedOtherComprehensiveIncomeDetails)
TableAccumulated Other Comprehensive Income (Loss) [Table]
Slicers (applies to each fact value in each table cell)
Reporting Entity [Axis]0000947484 (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
Equity Components [Axis]Equity Components [Axis]Equity Components [Axis]
Unrealized Appreciation on Available-For-Sale InvestmentsForeign Currency Translation AdjustmentsEquity Component [Domain]Unrealized Appreciation on Available-For-Sale InvestmentsForeign Currency Translation AdjustmentsEquity Component [Domain]Unrealized Appreciation on Available-For-Sale InvestmentsForeign Currency Translation AdjustmentsEquity Component [Domain]
Beginning balance
50,085,000  
(66,587,000) 
(16,502,000) 
161,598,000  
(32,742,000) 
128,856,000  
80,692,000  
(5,728,000) 
74,964,000  
Other comprehensive income (loss) before reclassifications
(21,365,000) 
(20,313,000) 
(41,678,000) 
(83,280,000) 
(33,845,000) 
(117,125,000) 
146,010,000  
(27,014,000) 
118,996,000  
Amounts reclassified from accumulated other comprehensive income
(56,361,000) 
0  
(56,361,000) 
(28,233,000) 
0  
(28,233,000) 
(65,104,000) 
0  
(65,104,000) 
Net current period other comprehensive income (loss)
(77,726,000) 
 
(20,313,000) 
 
(98,039,000) 
 
(111,513,000) 
 
(33,845,000) 
 
(145,358,000) 
 
80,906,000  
 
(27,014,000) 
 
53,892,000  
 
Ending balance
(27,641,000) 
 
(86,900,000) 
 
(114,541,000) 
 
50,085,000  
 
(66,587,000) 
 
(16,502,000) 
 
161,598,000  
 
(32,742,000) 
 
128,856,000