Consolidated Statement of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2019	Dec. 31, 2018	Mar. 31, 2018
Operating activities:
Cash provided by operating activities	$ 20,847	$ 13,193
Investing activities:
Capital expenditures	(8,840)	(10,428)
Proceeds from sale of royalty interests in oil properties	2,500
Proceeds from sale of business		8,000
Cash used in investing activities	(6,340)	(2,428)
Financing activities:
Payments of bank debt	(20,013)	(16,255)
Bank borrowings		5,000
Proceeds from noncontrolling interests (Note 15)		4,000
Taxes paid on vesting of RSUs		(4)
Dividends	(1,241)	(1,236)
Cash used in financing activities	(21,254)	(8,495)
Increase (decrease) in cash, cash equivalents, and restricted cash	(6,747)	2,270
Cash, cash equivalents, and restricted cash beginning of year	20,094	16,294
Cash, cash equivalents, and restricted cash end of year	13,347	18,564
Cash, cash equivalents, and restricted cash consists of the following:
Cash			$ 8,690	$ 15,502	$ 14,449
Restricted cash			4,657	4,592	4,115
Cash, cash equivalents, and restricted cash, Total	20,094	16,294	$ 13,347	$ 20,094	$ 18,564
Supplemental cash flow information:
Capital expenditures included in accounts payable	3,250	$ (3,903)
Right-to-use asset due to adoption of ASU 2016-02	$ 426