Significant Accounting Policies Insurance costs (Tables)

12 Months Ended

Dec. 31, 2016

Accounting Policies [Abstract]

Recognition of underwriting, acquisition and insurance costs

Underwriting, Acquisition and Insurance Expenses
	Year ended December 31,
	2016		2015		2014
	(Dollars in thousands)
Underwriting, acquisition and insurance expenses:
Commission expense, net of deferrals	$	22,735	$	22,260	$	22,856
Amortization of deferred acquisition costs	28,225		35,220		33,303
Amortization of value of insurance in force acquired	2,392		2,436		3,500
Other underwriting, acquisition and insurance expenses, net of deferrals	82,615		83,752		78,599
Total	$	135,967	$	143,668	$	138,258