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2452402 - Disclosure - Accumulated Other Comprehensive Income (Accumulated Other Comprehensive Income, Net of Related Tax Effects) (Details)
(http://www.columbia.com/role/AccumulatedOtherComprehensiveIncomeAccumulatedOtherComprehensiveIncomeNetOfRelatedTaxEffectsDetails)
TableAccumulated Other Comprehensive Income (Loss) [Table]
Slicers (applies to each fact value in each table cell)
Reporting Entity [Axis]0001050797 (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 Holding Gains (Losses) on Available-For-Sale Securities [Member]Unrealized Holding Gains (Losses) on Derivative Transactions [Member]Foreign Currency Translation Adjustment [Member]Equity Component [Domain]Unrealized Holding Gains (Losses) on Available-For-Sale Securities [Member]Unrealized Holding Gains (Losses) on Derivative Transactions [Member]Foreign Currency Translation Adjustment [Member]Equity Component [Domain]Unrealized Holding Gains (Losses) on Available-For-Sale Securities [Member]Unrealized Holding Gains (Losses) on Derivative Transactions [Member]Foreign Currency Translation Adjustment [Member]Equity Component [Domain]
Accumulated other comprehensive income at beginning of period
(2,000) 
6,087,000  
(26,921,000) 
(20,836,000) 
4,000  
8,995,000  
6,834,000  
15,833,000  
(6,000) 
1,244,000  
34,122,000  
35,360,000  
Other comprehensive income (loss) before reclassifications
(2,000) 
420,000  
(2,465,000) 
(2,047,000) 
(6,000) 
9,791,000  
(33,755,000) 
(23,970,000) 
10,000  
9,462,000  
(27,288,000) 
(17,816,000) 
Amounts reclassified from other comprehensive income
0  
266,000  
0  
266,000  
0  
(12,699,000) 
0  
(12,699,000) 
0  
(1,711,000) 
0  
(1,711,000) 
Net other comprehensive income (loss) during the period
(2,000) 
 
686,000  
 
(2,465,000) 
 
(1,781,000) 
 
(6,000) 
 
(2,908,000) 
 
(33,755,000) 
 
(36,669,000) 
 
10,000  
 
7,751,000  
 
(27,288,000) 
 
(19,527,000) 
 
Accumulated other comprehensive income at end of period
(4,000) 
 
6,773,000  
 
(29,386,000) 
 
(22,617,000) 
 
(2,000) 
 
6,087,000  
 
(26,921,000) 
 
(20,836,000) 
 
4,000  
 
8,995,000  
 
6,834,000  
 
15,833,000