- DefinitionAmount of realized and unrealized gain (loss) on investment.
Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
 -Publisher FASB
 -Name Accounting Standards Codification
 -Topic 320
 -SubTopic 10
 -Section 50
 -Paragraph 10
 -Subparagraph (c)
 -URI http://asc.fasb.org/extlink&oid=118939692&loc=d3e27405-111563
Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
 -Publisher FASB
 -Name Accounting Standards Codification
 -Topic 220
 -SubTopic 10
 -Section S99
 -Paragraph 2
 -Subparagraph (SX 210.5-03.7(c),9(a))
 -URI http://asc.fasb.org/extlink&oid=116634182&loc=SL114868664-224227
Reference 3: http://www.xbrl.org/2003/role/recommendedDisclosureRef
 -Publisher FASB
 -Name Accounting Standards Codification
 -Topic 230
 -SubTopic 10
 -Section 45
 -Paragraph 28
 -Subparagraph (b)
 -URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3602-108585
| Name: | us-gaap_GainLossOnInvestments | 
| Namespace Prefix: | us-gaap_ | 
| Data Type: | xbrli:monetaryItemType | 
| Balance Type: | credit | 
| Period Type: | duration |