Supplemental Cash Flow Information (Tables)

12 Months Ended

Dec. 31, 2017

Supplemental Cash Flow Elements [Abstract]

Schedule of Cash Flow Supplemental Information

Certain supplemental cash flow information, including noncash investing and financing activities for the years ended December 31, 2017, 2016, and 2015 are as follows:

	Year ended December 31,
	2017		2016			2015
Supplemental disclosure of cash flow information
Interest paid	$	23,958	$	21,407		$	19,292
Income taxes paid, net of refunds	2,065		(10,587		)	4,909
Noncash investing and financing activity
Capital projects incurred but not yet paid	6,840		3,092			7,507
Purchase of a productive asset through seller-financing	—		—			1,010
Shares issued for acquisition of business	—		—			4,303
Investment merger (decreasing equity method investments and non-controlling interest)	8,360		—			—
Dividends declared not yet paid	4,650		4,493			4,338