BONDS AVAILABLE-FOR-SALE (Details 2) (USD $) In Thousands, unless otherwise specified	Jul. 03, 2013	Jun. 30, 2013	Dec. 31, 2012
Amortized Cost, Bonds that may be prepaid without restrictions, premiums or penalties at June 30, 2013
Amortized Cost, at June 30, 2013	$ 7,752	$ 49,576
Amortized Cost, July 1 through December 31, 2013	1,132	1,132
Amortized Cost, 2014	0	0
Amortized Cost, 2015	0	2,562
Amortized Cost, 2016	12,972	12,972
Amortized Cost, 2017	5,855	14,520
Amortized Cost, Thereafter	106,730	630,136
Amortized Cost, Bonds that may not be prepaid	39,349	66,185
Amortized Cost, Total	173,790	777,083
Fair Value, Bonds that may be prepaid without restrictions, premiums or penalties at June 30, 2013
Fair Value, at June 30, 2013	10,528	54,609
Fair Value, July 1 through December 31, 2013	1,400	1,400
Fair Value, 2014	0	0
Fair Value, 2015	0	2,725
Fair Value, 2016	16,627	16,627
Fair Value, 2017	8,421	17,320
Fair Value, Thereafter	130,567	725,257
Fair Value, Bonds that may not be prepaid	49,797	78,384
Fair Value, Total	$ 217,340	$ 896,322	$ 969,394