FAIR VALUE MEASUREMENTS (Tables)

3 Months Ended

Mar. 31, 2013

FAIR VALUE MEASUREMENTS

Schedule of assets measured at fair value on recurring basis

	As of March 31, 2013
	Fair Value Measurements Using
	Quoted Prices in		Significant Other		Significant
	Active Markets for		Observable		Unobservable
(in thousands)	Identical Assets		Inputs		Inputs
Description	(Level 1)		(Level 2)		(Level 3)		Total
Trading securities
Corporate	$	—	$	—	$	—	$	—
Mortgage-backed	—		6		—		6
ABS/CMO*	—		—		—		—
U.S. government	—		—		—		—
Total trading securities	$	—	$	6	$	—	$	6
Available-for-sale securities
U.S. agency	$	—	$	11,703	$	—	$	11,703
Corporate	—		580,183		—		580,183
Mortgage-backed	—		264,773		—		264,773
ABS/CMO*	—		87,776		—		87,776
Non-U.S. govt. & agency	—		9,244		—		9,244
U.S. government	—		17,327		—		17,327
Municipal	—		442,564		—		442,564
Equity	407,680		—		—		407,680
Total available-for-sale securities	$	407,680	$	1,413,570	$	—	$	1,821,250
Total	$	407,680	$	1,413,576	$	—	$	1,821,256

*Asset-backed & collateralized mortgage obligations

	As of December 31, 2012
	Fair Value Measurements Using
	Quoted Prices in		Significant Other		Significant
	Active Markets for		Observable		Unobservable
(in thousands)	Identical Assets		Inputs		Inputs
Description	(Level 1)		(Level 2)		(Level 3)		Total
Trading securities
Corporate	$	—	$	—	$	—	$	—
Mortgage-backed	—		7		—		7
ABS/CMO*	—		—		—		—
U.S. government	—		—		—		—
Total trading securities	$	—	$	7	$	—	$	7
Available-for-sale securities
U.S. agency	$	—	$	11,759	$	—	$	11,759
Corporate	—		580,708		—		580,708
Mortgage-backed	—		250,387		—		250,387
ABS/CMO*	—		77,329		—		77,329
Non-U.S. govt. & agency	—		9,367		—		9,367
U.S. government	—		16,713		—		16,713
Municipal	—		432,319		—		432,319
Equity	375,788		—		—		375,788
Total available-for-sale securities	$	375,788	$	1,378,582	$	—	$	1,754,370
Total	$	375,788	$	1,378,589	$	—	$	1,754,377

*Asset-backed & collateralized mortgage obligations