Investments (Tables)

12 Months Ended

Dec. 31, 2016

Investments, Debt and Equity Securities [Abstract]

Amortized Cost, Gross Unrealized Gains And Losses, Fair Value And OTTI

The following tables show the cost or amortized cost, gross unrealized gains and losses, fair value and other-than-temporary impairment ("OTTI") included within accumulated other comprehensive income of the Company's fixed maturity and equity securities as of the dates indicated:

	December 31, 2016
	Cost or Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value		OTTI in  AOCI  (a)
Fixed maturity securities:
U.S. government and government   agencies and authorities	$	172,782	$	3,389	$	(1,285	)	$	174,886	$	—
States, municipalities and political   subdivisions	446,882		29,639		(446		)	476,075		—
Foreign governments	508,871		60,462		(865		)	568,468		—
Asset-backed	2,658		1,157		(138		)	3,677		1,117
Commercial mortgage-backed	39,267		142		(993		)	38,416		—
Residential mortgage-backed	1,071,179		38,130		(7,997		)	1,101,312		12,758
U.S. corporate	5,022,769		454,115		(15,634		)	5,461,250		15,616
Foreign corporate	1,606,429		147,174		(5,542		)	1,748,061		2,248
Total fixed maturity securities	$	8,870,837	$	734,208	$	(32,900	)	$	9,572,145	$	31,739
Equity securities:
Common stocks	$	11,911	$	8,890	$	(7	)	$	20,794	$	—
Non-redeemable preferred stocks	369,920		31,767		(1,120		)	400,567		—
Total equity securities	$	381,831	$	40,657	$	(1,127	)	$	421,361	$	—

	December 31, 2015
	Cost or Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value		OTTI in AOCI (a)
Fixed maturity securities:
U.S. government and government   agencies and authorities	$	150,681	$	3,891	$	(537	)	$	154,035	$	—
States, municipalities and political   subdivisions	647,335		48,389		(94		)	695,630		—
Foreign governments	497,785		65,188		(723		)	562,250		—
Asset-backed	3,499		1,367		(204		)	4,662		1,285
Commercial mortgage-backed	22,169		352		—			22,521		—
Residential mortgage-backed	953,247		48,676		(3,409		)	998,514		15,343
U.S. corporate	5,429,783		513,254		(73,344		)	5,869,693		15,705
Foreign corporate	1,766,296		164,295		(22,568		)	1,908,023		2,180
Total fixed maturity securities	$	9,470,795	$	845,412	$	(100,879	)	$	10,215,328	$	34,513
Equity securities:
Common stocks	$	13,048	$	6,623	$	(7	)	$	19,664	$	—
Non-redeemable preferred stocks	437,515		45,495		(2,617		)	480,393		—
Total equity securities	$	450,563	$	52,118	$	(2,624	)	$	500,057	$	—

(a) Represents the amount of OTTI recognized in accumulated other comprehensive income ("AOCI"). Amount includes unrealized gains and losses on impaired securities relating to changes in the value of such securities subsequent to the impairment measurement date.

Amortized Cost And Fair Value Of Fixed Maturity Securities By Contractual Maturity

The cost or amortized cost and fair value of available-for-sale fixed maturity securities in an unrealized loss position at December 31, 2016, by contractual maturity, is shown below:

	Cost or Amortized Cost		Fair Value
Due in one year or less	$	103,273	$	103,200
Due after one year through five years	421,271		418,100
Due after five years through ten years	479,658		471,605
Due after ten years	442,516		430,041
Total	1,446,718		1,422,946
Asset-backed	1,117		979
Commercial mortgage-backed	34,199		33,206
Residential mortgage-backed	357,715		349,718
Total	$	1,839,749	$	1,806,849

The cost or amortized cost and fair value of fixed maturity securities at December 31, 2016 by contractual maturity are shown below. Expected maturities may differ from contractual maturities because issuers of the securities may have the right to call or prepay obligations with or without call or prepayment penalties.

	Cost or Amortized Cost		Fair Value
Due in one year or less	$	428,433	$	433,479
Due after one year through five years	1,761,804		1,823,218
Due after five years through ten years	2,001,060		2,067,674
Due after ten years	3,566,436		4,104,369
Total	7,757,733		8,428,740
Asset-backed	2,658		3,677
Commercial mortgage-backed	39,267		38,416
Residential mortgage-backed	1,071,179		1,101,312
Total	$	8,870,837	$	9,572,145

Categories Of Net Investment Income

Major categories of net investment income were as follows:

	Years Ended December 31,
	2016			2015			2014
Fixed maturity securities	$	419,347		$	486,165		$	522,309
Equity securities	25,161			29,957			28,014
Commercial mortgage loans on real estate	41,669			72,658			73,959
Policy loans	2,577			2,478			2,939
Short-term investments	5,508			2,033			1,950
Other investments	21,671			37,759			34,527
Cash and cash equivalents	17,462			18,416			18,556
Total investment income	533,395			649,466			682,254
Investment expenses	(17,717		)	(23,249		)	(25,825		)
Net investment income	$	515,678		$	626,217		$	656,429

Proceeds From Sales Of Available-For-Sale Securities And The Gross Realized Gains And Gross Realized Losses

The following table summarizes the proceeds from sales of available-for-sale securities and the gross realized gains and gross realized losses that have been recognized in the statement of operations as a result of those sales:

	For the Years Ended December 31,
	2016		2015		2014
Proceeds from sales	$	4,610,681	$	2,568,166	$	1,995,368
Gross realized gains (a)	209,475		65,097		69,184
Gross realized losses (b)	65,206		31,657		10,681

(a) Twelve months ended December 31, 2016 gross realized gains includes $150,701 related to the sale of Assurant Employee Benefits as described in Note 5.

(b) Twelve months ended December 31, 2016 gross realized losses includes $16,427 related to the sale of Assurant Employee Benefits as described in Note 5.

Net Realized Gains (Losses), Including Other-Than-Temporary Impairments

The following table sets forth the net realized gains (losses), including OTTI, recognized in the statement of operations as follows:

	Years Ended December 31,
	2016			2015			2014
Net realized gains (losses) related to sales and other:
Fixed maturity securities	$	128,899		$	13,322		$	54,200
Equity securities	17,262			19,016			6,190
Commercial mortgage loans on real estate	21,823			817			532
Other investments	1,073			3,695			(109		)
Total net realized gains related to sales and other (a)	169,057			36,850			60,813
Net realized losses related to other-than-temporary impairments:
Fixed maturity securities	(700		)	(5,024		)	(30		)
Other investments	(6,174		)	—			—
Total net realized losses related to other-than-temporary impairments	(6,874		)	(5,024		)	(30		)
Total net realized gains	$	162,183		$	31,826		$	60,783

(a) Twelve months ended December 31, 2016 net gains includes $146,727 related to the sale of Assurant Employee Benefits as described in Note 5.

Credit Loss Impairments Recognized

The following table sets forth the amount of credit loss impairments recognized within the results of operations on fixed maturity securities held by the Company as of the dates indicated, for which a portion of the OTTI loss was recognized in AOCI, and the corresponding changes in such amounts:

	Years Ended December 31,
	2016			2015			2014
Balance, beginning of year	$	32,377		$	35,424		$	45,278
Additions for credit loss impairments recognized in the current period   on securities previously impaired	554			—			30
Additions for credit loss impairments recognized in the current period   on securities not previously impaired	—			2,621			—
Reductions for increases in cash flows expected to be collected that are   recognized over the remaining life of the security	(3,590		)	(2,398		)	(5,248		)
Reductions for credit loss impairments previously recognized on   securities which matured, paid down, prepaid or were sold during the   period	(4,397		)	(3,270		)	(4,636		)
Balance, end of year	$	24,944		$	32,377		$	35,424

Duration Of Gross Unrealized Losses On Fixed Maturity Securities And Equity Securities

The investment category and duration of the Company’s gross unrealized losses on fixed maturity securities and equity securities at December 31, 2016 and 2015 were as follows:

	December 31, 2016
	Less than 12 months					12 Months or More					Total
	Fair Value		Unrealized Losses			Fair Value		Unrealized Losses			Fair Value		Unrealized Losses
Fixed maturity securities:
U.S. government and government   agencies and authorities	$	91,038	$	(1,285	)	$	—	$	—		$	91,038	$	(1,285	)
States, municipalities and political   subdivisions	16,914		(446		)	—		—			16,914		(446		)
Foreign governments	98,759		(847		)	6,844		(18		)	105,603		(865		)
Asset-backed	—		—			979		(138		)	979		(138		)
Commercial mortgage-backed	33,206		(993		)	—		—			33,206		(993		)
Residential mortgage-backed	347,522		(7,892		)	2,196		(105		)	349,718		(7,997		)
U.S. corporate	940,434		(13,125		)	34,071		(2,509		)	974,505		(15,634		)
Foreign corporate	227,313		(4,584		)	7,573		(958		)	234,886		(5,542		)
Total fixed maturity securities	$	1,755,186	$	(29,172	)	$	51,663	$	(3,728	)	$	1,806,849	$	(32,900	)
Equity securities:
Common stock	$	673	$	(7	)	$	—	$	—		$	673	$	(7	)
Non-redeemable preferred stocks	64,419		(1,083		)	1,940		(37		)	66,359		(1,120		)
Total equity securities	$	65,092	$	(1,090	)	$	1,940	$	(37	)	$	67,032	$	(1,127	)

	December 31, 2015
	Less than 12 months					12 Months or More					Total
	Fair Value		Unrealized Losses			Fair Value		Unrealized Losses			Fair Value		Unrealized Losses
Fixed maturity securities:
U.S. government and government   agencies and authorities	$	90,008	$	(465	)	$	5,564	$	(72	)	$	95,572	$	(537	)
States, municipalities and political   subdivisions	6,881		(94		)	—		—			6,881		(94		)
Foreign governments	24,071		(347		)	22,239		(376		)	46,310		(723		)
Asset-backed	—		—			1,136		(204		)	1,136		(204		)
Residential mortgage-backed	260,620		(3,179		)	11,147		(230		)	271,767		(3,409		)
U.S. corporate	1,287,545		(65,631		)	38,224		(7,713		)	1,325,769		(73,344		)
Foreign corporate	348,912		(19,616		)	15,805		(2,952		)	364,717		(22,568		)
Total fixed maturity securities	$	2,018,037	$	(89,332	)	$	94,115	$	(11,547	)	$	2,112,152	$	(100,879	)
Equity securities:
Common stock	$	623	$	(7	)	$	—	$	—		$	623	$	(7	)
Non-redeemable preferred stocks	63,665		(1,632		)	13,806		(985		)	77,471		(2,617		)
Total equity securities	$	64,288	$	(1,639	)	$	13,806	$	(985	)	$	78,094	$	(2,624	)

Credit Quality Indicators For Commercial Mortgage Loans

The following summarizes the Company's loan-to-value and average debt-service coverage ratios as of the dates indicated:

	December 31, 2016
Loan-to-Value	Carrying Value			% of Gross Mortgage Loans		Debt-Service Coverage Ratio
70% and less	$	595,527		95.1	%	1.92
71 – 80%	9,868			1.6	%	1.15
81 – 95%	16,126			2.5	%	1.27
Greater than 95%	4,816			0.8	%	3.86
Gross commercial mortgage loans	626,337			100.0	%	1.91
Less valuation allowance	(2,304		)
Net commercial mortgage loans	$	624,033

	December 31, 2015
Loan-to-Value	Carrying Value			% of Gross Mortgage Loans		Debt-Service Coverage Ratio
70% and less	$	1,101,572		95.5	%	2.01
71 – 80%	39,080			3.4	%	1.19
81 – 95%	8,370			0.7	%	1.05
Greater than 95%	4,816			0.4	%	3.52
Gross commercial mortgage loans	1,153,838			100.0	%	1.98
Less valuation allowance	(2,582		)
Net commercial mortgage loans	$	1,151,256