Credit Facilities and Long-Term Debt, Deferred Financing Costs (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Amortization for Future Years [Abstract]
2017	$ 343
2018	343
2019	343
2020	287
Total amortization	1,316
Deferred financing costs	1,300	$ 1,600
Amount capitalized in relation to amendment of revolving credit facility		700
Write off of deferred financing costs	$ 0	$ 773	$ 0