Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands		9 Months Ended
		Sep. 30, 2017	Sep. 30, 2016
Operating activities:
Cash provided by operating activities		$ 47,387	$ 43,691
Investing activities:
Capital expenditures	[1]	(21,328)	(11,810)
Proceeds from sale of equipment		506
Proceeds from maturities of certificates of deposit		4,580
Purchase of mining assets			(18,000)
Other			186
Cash used in investing activities		(16,242)	(29,624)
Financing activities:
Payments on bank debt		(27,875)	(26,492)
Bank borrowings			15,000
Debt issuance cost			(2,090)
Dividends		(3,651)	(3,597)
Cash used in financing activities		(31,526)	(17,179)
Increase in cash and cash equivalents		(381)	(3,112)
Cash and cash equivalents, beginning of period		9,788	15,930
Cash and cash equivalents, end of period		9,407	$ 12,818
Decrease in prepaid assets		$ (3,300)

[1] We acquired $3.3 million in capital equipment in the first nine months of 2017 that was prepaid in a prior period.