Statutory Information and Restrictions (Details Textual) $ in Thousands	12 Months Ended
	Dec. 31, 2016 USD ($)	Dec. 31, 2015 USD ($)
Minimum statutory-basis capital and surplus	$ 148,583	$ 139,949
Restricted net assets of HMEC's insurance subsidiaries	18,119	18,312
Aggregate amount of dividends	91,000
Statutory capital and surplus of insurance subsidiaries	912,336	$ 883,870
Liquid assets of parent company	$ 4,069
Number of financial reinsurance agreements	0