SUMMARY OF INVESTMENTS (Maturities) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Held-To-Maturity, Amortized Cost
Amortized Cost	$ 656	$ 1,655
Held-To-Maturity, Fair Value
Fair Value	669	1,681
Available-For-Sale, Amortized Cost
Amortized Cost	2,804,514	2,724,692
Available-For-Sale, Fair Value
Fair Value	2,980,624	2,985,205
Trading, Fair Value
Fair Value	9,940	13,353
Asset-Backed Securities [Member]
Available-For-Sale, Amortized Cost
Amortized Cost	3,719	4,480
Available-For-Sale, Fair Value
Fair Value	3,995	4,886
Mortgage Backed Securities [Member]
Held-To-Maturity, Amortized Cost
Amortized Cost	206	256
Held-To-Maturity, Fair Value
Fair Value	215	271
Available-For-Sale, Amortized Cost
Amortized Cost	22,034	27,940
Available-For-Sale, Fair Value
Fair Value	22,066	28,807
Collateralized Mortgage Obligations [Member]
Held-To-Maturity, Amortized Cost
Amortized Cost		14
Held-To-Maturity, Fair Value
Fair Value		14
Available-For-Sale, Amortized Cost
Amortized Cost	309,975	208,042
Available-For-Sale, Fair Value
Fair Value	294,763	214,584
Fixed Maturities [Member]
Held-To-Maturity, Amortized Cost
Due in one year or less	135
Due after one year through five years	315
Due after five years through 10 years	0
Due after 10 years	0
Amortized Cost	656
Held-To-Maturity, Fair Value
Due in one year or less	136
Due after one year through five years	318
Due after five years through 10 years	0
Due after 10 years	0
Fair Value	669
Available-For-Sale, Amortized Cost
Due in one year or less	231,060
Due after one year through five years	950,084
Due after five years through 10 years	848,931
Due after 10 years	367,754
Amortized Cost	2,733,557
Available-For-Sale, Fair Value
Due in one year or less	234,922
Due after one year through five years	996,862
Due after five years through 10 years	855,156
Due after 10 years	343,492
Fair Value	2,751,256
Trading, Amortized Cost
Due in one year or less	1,350
Due after one year through five years	3,762
Due after five years through 10 years	0
Due after 10 years	2,937
Amortized Cost	8,049
Trading, Fair Value
Due in one year or less	1,359
Due after one year through five years	5,147
Due after five years through 10 years	0
Due after 10 years	3,434
Fair Value	9,940
Fixed Maturities [Member] | Asset-Backed Securities [Member]
Held-To-Maturity, Amortized Cost
Not categorized by contractual maturity	0
Held-To-Maturity, Fair Value
Not categorized by contractual maturity	0
Available-For-Sale, Amortized Cost
Not categorized by contractual maturity	3,719
Available-For-Sale, Fair Value
Not categorized by contractual maturity	3,995
Fixed Maturities [Member] | Mortgage Backed Securities [Member]
Held-To-Maturity, Amortized Cost
Not categorized by contractual maturity	206
Held-To-Maturity, Fair Value
Not categorized by contractual maturity	215
Available-For-Sale, Amortized Cost
Not categorized by contractual maturity	22,034
Available-For-Sale, Fair Value
Not categorized by contractual maturity	22,066
Fixed Maturities [Member] | Collateralized Mortgage Obligations [Member]
Held-To-Maturity, Amortized Cost
Not categorized by contractual maturity	0
Held-To-Maturity, Fair Value
Not categorized by contractual maturity	0
Available-For-Sale, Amortized Cost
Not categorized by contractual maturity	309,975
Available-For-Sale, Fair Value
Not categorized by contractual maturity	$ 294,763