Recent Relevant Accounting Standards (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Unamortized debt issuance costs	$ 2,286	$ 4,073
ASU No. 2015-03 [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Unamortized debt issuance costs	2,300	$ 4,100
ASU No. 2016-09 [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Retained earnings	$ 6,500