Segment Information (Narrative) (Details)	12 Months Ended
	Dec. 31, 2017
American Hallmark Insurance Company [Member]
Net premiums written, percentage	34.00%
Hallmark Insurance Company (Payer) [Member]
Net premiums written, percentage	32.00%
Hallmark Specialty Insurance Company [Member]
Net premiums written, percentage	24.00%
Hallmark National Insurance Company [Member]
Net premiums written, percentage	10.00%