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CREDIT FACILITY (Trust Preferred Securities) (Details) (Mercer Insurance Group [Member], USD $) In Thousands, unless otherwise specified	12 Months Ended	0 Months Ended
	Dec. 31, 2012	Mar. 28, 2011 issues
Financial Instruments Subject to Mandatory Redemption by Settlement [Line Items]
Interest expense, trust preferred securities	$ 509
Trust Preferred Securities [Member]
Financial Instruments Subject to Mandatory Redemption by Settlement [Line Items]
Number of issuances of securities assumed with acquisition		3
Outstanding balance of the securities assumed with acquisition		$ 15,614

The amount of interest incurred to a trust which has issued trust-preferred securities. In order to issue trust preferred securities, a sponsor forms a trust by investing a nominal amount of cash to purchase all of the voting common stock of the trust. The trust issues nonvoting, mandatorily redeemable preferred securities to outside investors in exchange for cash. The proceeds received from the issuance of the preferred securities, together with the cash received for issuing the common stock to the sponsor, is then loaned to the sponsor in exchange for a note which has the same terms as the trust preferred securities. Trust preferred securities possesses characteristics of both equity and debt issues and are generally issued by bank holding companies.

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