Supplemental Cash Flow Information (Details) - USD ($) $ in Thousands	6 Months Ended
Jun. 30, 2019	Jun. 30, 2018
Supplemental Cash Flow Information [Abstract]
Interest paid	$ 30,287	$ 16,982
Noncash investing and financing activity
Equity issued in conjunction with acquisition	127,841	0
Removal of pre-existing equity method investment	(159,459)	0
Purchase price holdback/ other accrued liabilities	31,885	0
Dividends declared not yet paid	5,530	4,663
Debt resulting from accounting standard adoption	0	36,953
Railcar assets and liabilities resulting from accounting standard adoption	0	25,643
Capital projects incurred but not yet paid	$ 15,317	$ 10,744

Noncash or Part Noncash Acquisition, Noncash Financial or Equity Instrument Consideration Shares Issued, Value

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Fair value at acquisition-date of the equity interest in the acquiree held by the acquirer, immediately before the acquisition date for businesses combined in stages.

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Future cash outflow to pay for purchases of fixed assets that have occurred.

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Carrying value as of the balance sheet date of dividends declared but unpaid on equity securities issued by the entity and outstanding.

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Amount of cash paid for interest, including, but not limited to, capitalized interest and payment to settle zero-coupon bond attributable to accreted interest of debt discount and debt instrument with insignificant coupon interest rate in relation to effective interest rate of borrowing attributable to accreted interest of debt discount; classified as operating and investing activities.

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The fair value of stock issued in noncash financing activities.

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