Unpaid Losses and Settlement Expenses (Tables)

12 Months Ended

Dec. 31, 2017

Insurance Loss Reserves [Abstract]

Summary of Cumulative Paid Losses and Settlement Expenses

PROPERTY LINES
Incurred loss and settlement expenses, net of reinsurance (in thousands)																					As of December 31, 2017
	Year Ended December 31,
Accident Year		2008		2009		2010		2011		2012		2013		2014		2015		2016		2017	Total IBNR plus expected development on reported claims		Cumulative number of reported claims
2008	$	6,980	$	6,892	$	6,703	$	6,484	$	6,901	$	6,837	$	6,792	$	6,805	$	6,774	$	6,773	$	—	706
2009				4,560		4,099		3,889		4,406		4,562		4,409		4,352		4,370		4,339		—	479
2010						5,644		5,105		4,831		4,992		5,118		5,006		4,891		4,899		13	485
2011								7,427		6,708		6,621		6,752		6,733		6,645		6,631		1	655
2012										6,143		6,374		6,406		6,546		6,482		6,411		(12)	507
2013												9,266		8,302		8,290		8,415		8,471		161	482
2014														8,865		7,586		7,798		7,883		48	561
2015																7,693		7,494		7,717		(9)	427
2016																		8,941		7,981		(249)	445
2017																				13,993		204	515
Total																				75,098

Cumulative paid loss and settlement expenses, net of reinsurance (in thousands)
	Year Ended December 31,
Accident Year		2008		2009		2010		2011		2012		2013		2014		2015		2016		2017
2008	$	4,308	$	6,668	$	6,538	$	6,584	$	6,715	$	6,774	$	6,775	$	6,773	$	6,773	$	6,773
2009				2,991		3,930		4,082		4,137		4,280		4,349		4,338		4,338		4,339
2010						3,166		4,584		4,719		4,740		4,791		4,818		4,873		4,874
2011								5,327		6,351		6,459		6,520		6,556		6,589		6,623
2012										4,949		6,401		6,369		6,362		6,326		6,472
2013												6,856		8,079		8,200		8,238		8,265
2014														6,243		7,631		7,746		7,796
2015																5,057		7,040		7,474
2016																		6,157		7,624
2017																				10,055
Total																				70,295
Unpaid losses and settlement expense - years 2008 through 2017																				4,803
Unpaid losses and settlement expense - prior to 2008																				(1)
Unpaid loss and settlement expense, net of reinsurance																			$	4,802

WORKERS COMPENSATION AND LIABILITY LINES
Incurred loss and settlement expenses, net of reinsurance (in thousands)																					As of December 31, 2017
	Year Ended December 31,
Accident Year		2008		2009		2010		2011		2012		2013		2014		2015		2016		2017	Total IBNR plus expected development on reported claims		Cumulative number of reported claims
2008	$	15,484	$	14,493	$	14,616	$	14,538	$	14,169	$	14,224	$	14,161	$	14,183	$	14,324	$	14,361	$	24	1,532
2009				11,945		10,845		11,549		11,807		12,119		12,098		11,824		11,895		11,951		17	1,259
2010						10,475		11,039		10,683		11,371		11,701		11,474		11,422		11,431		60	1,093
2011								12,375		12,126		11,894		12,039		12,098		12,027		11,819		73	1,356
2012										13,122		11,338		11,407		11,638		12,692		12,845		229	1,325
2013												12,584		13,559		13,169		12,960		13,696		466	1,314
2014														13,385		14,744		15,341		16,718		914	1,411
2015																16,596		13,876		13,440		3,144	1,236
2016																		16,677		14,843		5,224	1,147
2017																				15,808		10,739	1,016
Total																				136,912

Cumulative paid loss and settlement expenses, net of reinsurance (in thousands)
	Year Ended December 31,
Accident Year		2008		2009		2010		2011		2012		2013		2014		2015		2016		2017
2008	$	1,482	$	3,832	$	6,814	$	9,739	$	11,713	$	12,622	$	13,491	$	14,026	$	14,232	$	14,290
2009				1,202		3,014		6,175		8,289		10,281		11,080		11,432		11,639		11,862
2010						1,248		3,395		5,865		8,462		10,022		10,733		11,067		11,194
2011								1,669		3,761		5,841		8,072		10,122		10,971		11,484
2012										1,180		3,021		5,589		8,327		10,913		11,753
2013												1,579		4,156		7,634		10,423		12,181
2014														1,539		4,087		9,515		13,602
2015																1,405		4,319		7,400
2016																		1,490		5,485
2017																				1,523
Total																				100,774
Unpaid losses and settlement expense - years 2008 through 2017																				36,138
Unpaid losses and settlement expense - prior to 2008																				104
Unpaid loss and settlement expense, net of reinsurance																			$	36,242

TOTAL LINES
Incurred loss and settlement expenses, net of reinsurance (in thousands)																					As of December 31, 2017
	Year Ended December 31,
Accident Year		2008		2009		2010		2011		2012		2013		2014		2015		2016		2017	Total IBNR plus expected development on reported claims		Cumulative number of reported claims
2008	$	22,464	$	21,385	$	21,319	$	21,022	$	21,070	$	21,061	$	20,953	$	20,988	$	21,098	$	21,134	$	24	2,238
2009				16,505		14,944		15,438		16,213		16,681		16,507		16,176		16,265		16,290		17	1,738
2010						16,119		16,144		15,514		16,363		16,819		16,480		16,313		16,330		73	1,578
2011								19,802		18,834		18,515		18,791		18,831		18,672		18,450		74	2,011
2012										19,265		17,712		17,813		18,184		19,174		19,256		217	1,832
2013												21,850		21,861		21,459		21,375		22,167		627	1,796
2014														22,250		22,330		23,139		24,601		962	1,972
2015																24,289		21,370		21,157		3,135	1,663
2016																		25,618		22,824		4,975	1,592
2017																				29,801		10,943	1,531
Total																				212,010

Cumulative paid loss and settlement expenses, net of reinsurance (in thousands)
	Year Ended December 31,
Accident Year		2008		2009		2010		2011		2012		2013		2014		2015		2016		2017
2008	$	5,790	$	10,500	$	13,352	$	16,323	$	18,428	$	19,396	$	20,266	$	20,799	$	21,005	$	21,063
2009				4,193		6,944		10,257		12,426		14,561		15,429		15,770		15,977		16,201
2010						4,414		7,979		10,584		13,202		14,813		15,551		15,940		16,068
2011								6,996		10,112		12,300		14,592		16,678		17,560		18,107
2012										6,129		9,422		11,958		14,689		17,239		18,225
2013												8,435		12,235		15,834		18,661		20,446
2014														7,782		11,718		17,261		21,398
2015																6,462		11,359		14,874
2016																		7,647		13,109
2017																				11,578
Total																				171,069
Unpaid losses and settlement expense - years 2008 through 2017																				40,941
Unpaid losses and settlement expense - prior to 2008																				103
Unpaid loss and settlement expense, net of reinsurance																			$	41,044

Summary of Annual Percentage Payout

	Average annual percentage payout of incurred losses by age, net of reinsurance
	Year 1	Year 2	Year 3	Year 4	Year 5	Year 6	Year 7	Year 8	Year 9+
Property Lines	71.3%	13.6%	3.4%	2.8%	7.8%	-0.3%	0.5%	1.0%	-0.1%
Liability Lines	40.5%	27.2%	15.7%	6.9%	4.1%	3.0%	1.1%	0.7%	0.2%
Total Lines	42.8%	26.2%	14.6%	6.7%	4.4%	2.8%	1.0%	0.7%	0.7%

Schedule of the Changes in the Reserves for Losses and Loss Adjustment Expense

(In thousands)	2017		2016
Unpaid losses and settlement expense - beginning of the period:
Gross	$	52,817	$	61,056
Less: Ceded		12,115		19,158
Net		40,702		41,898
Increase (decrease) in incurred losses and settlement expense:
Current year		29,801		25,620
Prior years		(791)		(1,275)
Total incurred		29,010		24,345
Deduct: Loss and settlement expense payments for claims incurred:
Current year		11,578		7,649
Prior years		17,090		17,892
Total paid		28,668		25,541
Net unpaid losses and settlement expense - end of the period		41,044		40,702
Plus: Reinsurance recoverable on unpaid losses		10,030		12,115
Gross unpaid losses and settlement expense - end of the period	$	51,074	$	52,817

(In thousands)	2017		2016
Supplemental ceded unpaid losses and settlement expense at end of year disclosure:
Reinsurance balances recoverable on unpaid losses and settlement expenses,
net of allowances for uncollectible amounts of $0 in 2017 and $0 in 2016	$	10,030	$	12,115
Less : Reinsurance balances payable		—		—
Reinsurance recoverable on unpaid losses	$	10,030	$	12,115