Commitments and Contingencies Line of Credit (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2014	Dec. 31, 2016	Dec. 31, 2015
Commitments and Contingencies Disclosure [Abstract]
Line of Credit Maintained	$ 5,000	$ 1,000
Collateral required - old line of credit	$ 6,300
Restricted investments		$ 1,250	$ 1,401