NOTES PAYABLE - DIRECT CORPORATE OBLIGATIONS (DETAILS) (USD $)	Jun. 30, 2014	Dec. 31, 2013	Sep. 28, 2012
Debt Instrument [Line Items]
Notes payable – direct corporate obligations	$ 827,300,000	$ 856,400,000
Senior secured note 6.375 percent
Debt Instrument [Line Items]
Interest rate	6.375%
Senior secured note 6.375 percent | Senior notes
Debt Instrument [Line Items]
Notes payable – direct corporate obligations	275,000,000	275,000,000	275,000,000
Interest rate			6.375%
Limit of restricted payments permitted, amount	175,000,000
Limit of restricted payments permitted, amount of allowed additional payments	178,000,000
Senior secured note 6.375 percent | Senior notes | Minimum
Debt Instrument [Line Items]
Minimum pro forma risk-based capital ratio for restricted payments	225.00%
Limit of restricted payments permitted, cash dividends to common stock	$ 30,000,000
Senior secured note 6.375 percent | Senior notes | Maximum
Debt Instrument [Line Items]
Debt to capitalization ratio, threshold requiring equal debt repayment	17.50%