Investments: (Tables)

12 Months Ended

Dec. 31, 2012

Investments:

Summary of activities for available-for-sale securities

		(dollars in thousands)
	Gross Unrealized
2012		Cost		Gains		Losses			Fair Value
Equity	$	153,846	$	45,071	$	(3,675	)	$	195,242
Debt		163,127		10,286		(4,501	)		168,912
Other		13,654		–		–			13,654
Total	$	330,627	$	55,357	$	(8,176	)	$	377,808
		(dollars in thousands)
		Gross Unrealized
2011		Cost		Gains		Losses			Fair Value
Equity	$	149,263	$	29,789	$	(9,996	)	$	169,056
Debt		160,218		18,021		(11,063	)		167,176
Other		15,646		1,035		(1,541	)		15,140
Total	$	325,127	$	48,845	$	(22,600	)	$	351,372

Schedule of contractual maturities of debt securities available-for-sale

		(dollars in thousands)
		2012				2011
		Cost		Fair Value		Cost		Fair Value
Due within one year	$	2,265	$	2,191	$	2,074	$	2,051
Due after one year through five years		43,050		43,533		32,149		32,598
Due after five years through ten years		68,893		71,217		68,987		74,010
Due after ten years		48,919		51,971		57,008		58,517
Total	$	163,127	$	168,912	$	160,218	$	167,176

Summary of realized gains and losses and proceeds from sales of securities

		(dollars in thousands)
		For the years ended December 31,
		2012			2011			2010
Gross realized gains	$	28,959		$	31,130		$	24,634
Gross realized losses		(18,175	)		(16,215	)		(10,395	)
Proceeds from sales		666,481			1,064,377			622,124

Schedule of investments in associated companies

		(dollars in thousands)
		2012		2011
National Rural Utilities Cooperative
Finance Corporation (CFC)	$	24,005	$	23,993
CoBank, ACB		2,931		3,345
CT Parts, LLC		7,128		5,633
Georgia Transmission Corporation		20,867		19,291
Georgia System Operations Corporation		4,375		3,911
Other		1,464		1,453
Total	$	60,770	$	57,626