Partners' Capital, Mezzanine Equity and Distributions (New Common Units Issued to the Public for Cash) (Details) $ / shares in Units, shares in Thousands, $ in Thousands	Mar. 24, 2017 USD ($) $ / shares shares
Equity [Abstract]
Units (in units) | shares	4,600
Gross Unit Price (in dollars per unit) | $ / shares	$ 30.65
Issuance Value	$ 140,990
Costs	(477)
Net Proceeds	$ 140,513