CONSOLIDATED STATEMENTS OF INCOME (Parenthetical) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011		Dec. 31, 2010
CONSOLIDATED STATEMENTS OF INCOME
Benefits and settlement expenses, reinsurance ceded	$ 1,228,897	$ 1,231,405	[1]	$ 1,283,054	[1]
Other operating expenses, reinsurance ceded	$ 200,442	$ 203,868	[1]	$ 205,299	[1]

[1] Recast from previously reported information