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Investments (Tables)
12 Months Ended
Dec. 31, 2016
Investments, Debt and Equity Securities [Abstract]  
Schedule of Cost or Amortized Cost, Gross Unrealized Gains and Losses, Fair Value and OTTI of Fixed Maturity and Equity Securities
The following tables show the cost or amortized cost, gross unrealized gains and losses, fair value and other-than-temporary impairment ("OTTI") 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:
 
 
 
 
 
 
 
 
 
United States Government and government
agencies and authorities
$
1,844

 
$
143

 
$

 
$
1,987

 
$

States, municipalities and political
subdivisions
9,890

 
937

 

 
10,827

 

Foreign governments
9,286

 
2,015

 

 
11,301

 

Asset-backed
161

 
8

 

 
169

 

Commercial mortgage-backed
3,426

 

 
(181
)
 
3,245

 

Residential mortgage-backed
33,731

 
3,190

 
(58
)
 
36,863

 
2,009

U.S. corporate
667,024

 
127,719

 
(1,344
)
 
793,399

 
11,181

Foreign corporate
146,104

 
24,903

 
(135
)
 
170,872

 

Total fixed maturity securities
$
871,466

 
$
158,915

 
$
(1,718
)
 
$
1,028,663

 
$
13,190

Equity securities:
 
 
 
 
 
 
 
 
 
Common stocks
$
92

 
$
355

 
$

 
$
447

 
$

Non-redeemable preferred stocks
85,610

 
7,744

 
(184
)
 
93,170

 

Total equity securities
$
85,702

 
$
8,099

 
$
(184
)
 
$
93,617

 
$

 
December 31, 2015
 
Cost or
 Amortized
 Cost
 
Gross
 Unrealized
 Gains
 
Gross
Unrealized
Losses
 
Fair Value
 
OTTI in
 AOCI (a)
Fixed maturity securities:
 
 
 
 
 
 
 
 
 
United States Government and government
agencies and authorities
$
1,859

 
$
194

 
$

 
$
2,053

 
$

States, municipalities and political
subdivisions
36,850

 
1,890

 

 
38,740

 

Foreign governments
14,567

 
2,644

 

 
17,211

 

Asset-backed
575

 
37

 

 
612

 

Commercial mortgage-backed
1,064

 
15

 

 
1,079

 

Residential mortgage-backed
64,917

 
6,133

 
(100
)
 
70,950

 
2,346

U.S. corporate
1,613,522

 
230,567

 
(14,060
)
 
1,830,029

 
11,972

Foreign corporate
439,323

 
53,119

 
(6,195
)
 
486,247

 

Total fixed maturity securities
$
2,172,677

 
$
294,599

 
$
(20,355
)
 
$
2,446,921

 
$
14,318

Equity securities:
 
 
 
 
 
 
 
 
 
Common stocks
$
92

 
$
361

 
$

 
$
453

 
$

Non-redeemable preferred stocks
144,315

 
13,783

 
(469
)
 
157,629

 

Total equity securities
$
144,407

 
$
14,144

 
$
(469
)
 
$
158,082

 
$

(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.
Schedule of Cost or Amortized Cost and Fair Value of Fixed Maturity Securities By Contractual Maturity
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
$
17,989

 
$
18,351

Due after one year through five years
123,493

 
134,019

Due after five years through ten years
99,588

 
110,196

Due after ten years
593,078

 
725,820

Total
834,148

 
988,386

Asset-backed
161

 
169

Commercial mortgage-backed
3,426

 
3,245

Residential mortgage-backed
33,731

 
36,863

Total
$
871,466

 
$
1,028,663

Schedule of Major Categories of Net Investment Income
Major categories of net investment income were as follows:
 
Years Ended December 31,
 
2016
 
2015
 
2014
Fixed maturity securities
$
74,061

 
$
129,980

 
$
136,005

Equity securities
7,018

 
9,139

 
6,932

Commercial mortgage loans on real estate
10,232

 
30,417

 
33,403

Policy loans
455

 
529

 
778

Short-term investments
491

 
39

 
9

Other investments
7,166

 
5,266

 
10,617

Cash and cash equivalents
340

 
3

 
4

Total investment income
99,763

 
175,373

 
187,748

Investment expenses
(1,993
)
 
(5,920
)
 
(7,014
)
Net investment income
$
97,770

 
$
169,453

 
$
180,734

Summary of 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 included in earnings as a result of those sales.
 
For the Years Ended December 31,
 
2016
 
2015
 
2014
Proceeds from sales
$
1,939,365

 
$
312,031

 
$
294,502

Gross realized gains (a)
168,905

 
9,733

 
16,833

Gross realized losses (b)
(19,928
)
 
(4,284
)
 
(1,083
)

(a) The year ended December 31, 2016 gross realized gains includes $145,551 related to the sale of Assurant Employee Benefits as described in Note 1.
(b) The year ended December 31,2016 gross realized losses includes $15,945 related to the sale of Assurant Employee benefits as described in Note 1.
Schedule of Net Realized Gains (Losses), Including Other-Than-Temporary Impairments
The following table sets forth the net realized gains (losses), including other-than-temporary impairments, 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
$
143,602

 
$
3,164

 
$
16,820

Equity securities
5,680

 
1,791

 
(328
)
Commercial mortgage loans on real estate
13,647

 
390

 
32

Other investments
2,193

 
11,699

 
(159
)
Total net realized gains related to sales and other (a)
165,122

 
17,044

 
16,365

Net realized losses related to other-than-temporary impairments:
 
 
 
 
 
Fixed maturity securities
(327
)
 
(2,382
)
 
(24
)
Other investments
(1,852
)
 
(4,641
)
 

Total net realized losses related to other-than-temporary impairments
(2,179
)
 
(7,023
)
 
(24
)
Total net realized gains
$
162,943

 
$
10,021

 
$
16,341


(a) The year ended December 31, 2016 net gains includes $141,462 related to the sale of Assurant Employee Benefits as described in Note 1.
Schedule of Credit Loss Impairments on Fixed Maturity Securities for Which a Portion of the OTTI Loss was Recognized in AOCI
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
$
13,639

 
$
13,467

 
$
14,164

Additions for credit loss impairments recognized in the current period on
 securities previously impaired
326

 

 
24

Additions for credit loss impairments recognized in the current period on
 securities not previously impaired

 
763

 

Reductions for increases in cash flows expected to be collected that are
 recognized over the remaining life of the security
(538
)
 
(224
)
 
(461
)
Reductions for credit loss impairments previously recognized on securities
 which matured, paid down, prepaid or were sold during the period
(2,354
)
 
(367
)
 
(260
)
Balance, end of year
$
11,073

 
$
13,639

 
$
13,467

Schedule 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:
 
 
 
 
 
 
 
 
 
 
 
Commercial mortgage-backed
$
3,245

 
$
(181
)
 
$

 
$

 
$
3,245

 
$
(181
)
Residential mortgage-backed
1,900

 
(58
)
 

 

 
1,900

 
(58
)
U.S. corporate
55,335

 
(1,104
)
 
1,260

 
(240
)
 
56,595

 
(1,344
)
Foreign corporate
3,135

 
(69
)
 
1,970

 
(66
)
 
5,105

 
(135
)
Total fixed maturity securities
$
63,615

 
$
(1,412
)
 
$
3,230

 
$
(306
)
 
$
66,845

 
$
(1,718
)
Equity securities:
 
 
 
 
 
 
 
 
 
 
 
Non-redeemable preferred stocks
$
13,404

 
$
(184
)
 
$

 
$

 
$
13,404

 
$
(184
)
 
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:
 
 
 
 
 
 
 
 
 
 
 
Residential mortgage-backed
$
5,820

 
$
(91
)
 
$
522

 
$
(9
)
 
$
6,342

 
$
(100
)
U.S. corporate
215,774

 
(12,481
)
 
9,803

 
(1,579
)
 
225,577

 
(14,060
)
Foreign corporate
67,198

 
(5,844
)
 
1,035

 
(351
)
 
68,233

 
(6,195
)
Total fixed maturity securities
$
288,792

 
$
(18,416
)
 
$
11,360

 
$
(1,939
)
 
$
300,152

 
$
(20,355
)
Equity securities:
 
 
 
 
 
 
 
 
 
 
 
Non-redeemable preferred stocks
$
16,307

 
$
(330
)
 
$
4,573

 
$
(139
)
 
$
20,880

 
$
(469
)
Schedule of Cost or Amortized Cost and Fair Value of Available-For-Sale Fixed Maturity Securities in an Unrealized Loss Position
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 through five years
6,944

 
6,914

Due after five years through ten years
17,682

 
17,443

Due after ten years
38,553

 
37,343

Total
63,179

 
61,700

Commercial mortgage-backed
3,426

 
3,245

Residential mortgage-backed
1,958

 
1,900

Total
$
68,563

 
$
66,845

Summary of Loan-To-Value and Average Debt-Service Coverage Ratios
The following summarizes our 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
 
$
92,357

 
92.2
%
 
1.80

81 - 95%
 
2,975

 
3.0
%
 
1.11

Greater than 95%
 
4,816

 
4.8
%
 
3.86

Gross commercial mortgage loans on real estate
 
100,148

 
100.0
%
 
1.88

Less valuation allowance
 
(1,697
)
 
 

 
 

Net commercial mortgage loans on real estate
 
$
98,451

 
 

 
 

 
 
December 31, 2015
Loan-to-Value
 
Carrying
Value
 
% of
 Gross
Mortgage
Loans
 
Debt-
Service
Coverage
 Ratio
70% and less
 
$
399,321

 
94.7
%
 
1.98

71 - 80%
 
11,590

 
2.8
%
 
1.25

81 - 95%
 
5,916

 
1.4
%
 
0.92

Greater than 95%
 
4,816

 
1.1
%
 
3.52

Gross commercial mortgage loans on real estate
 
421,643

 
100.0
%
 
1.96

Less valuation allowance
 
(1,074
)
 
 

 
 

Net commercial mortgage loans on real estate
 
$
420,569