Amount, after premiums ceded to other entities and premiums assumed by the entity, of premiums written.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 17

-Article 12

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 944

-SubTopic 605

-Section 50

-Paragraph 1

-Subparagraph (b),(c)

-URI http://asc.fasb.org/extlink&oid=6486672&loc=d3e27261-158547

Name:	us-gaap_PremiumsWrittenNet
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details 9) - 10K (USD $) In Thousands, unless otherwise specified	12 Months Ended			72 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2014
Environmental Exposures
Premiums written	$ 703,152us-gaap_PremiumsWrittenNet	$ 666,322us-gaap_PremiumsWrittenNet	$ 593,086us-gaap_PremiumsWrittenNet
Casualty segment \| Environmental liability exposures
Environmental Exposures
Premiums written	$ 3,700			$ 13,000