Investments Fixed maturities by contractual periods (Tables)

6 Months Ended

Jun. 30, 2018

Schedule of Held-to-maturity Securities [Line Items]

Investments Classified by Contractual Maturity Date [Table Text Block]

(in thousands)	June 30, 2018
	Amortized Cost		Estimated Fair Value
Due in one year or less	$	4,924	$	4,899
Due after one year through five years	5,378		5,219
Due after five years through ten years	132		125
Due after ten years	1,171		1,118
Total	$	11,605	$	11,361

Schedule of Realized Gain (Loss) [Table Text Block]

(in thousands)	Three months ended June 30,						Six months ended June 30,
	2018			2017			2018			2017
Gross realized gains	$	133		$	—		$	398		$	—
Gross realized losses	(1		)	(1		)	(1		)	(1		)
Net realized gains (losses)	$	132		$	(1	)	$	397		$	(1	)