Consolidated Statement of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Operating activities:
Cash provided by operating activities	$ 19,113	$ 21,963
Investing activities:
Purchase of assets	(18,000)
Mining equipment	(6,053)	(8,250)
Other	(589)	190
Cash used in investing activities	(24,642)	(8,060)
Financing activities:
Bank borrowings	15,000
Debt issuance cost	(2,090)
Dividends	(1,194)	(1,200)
Payments on bank debt	(8,366)	(14,375)
Cash provided by (used in) financing activities	3,350	(15,575)
Decrease in cash and cash equivalents	(2,179)	(1,672)
Cash and cash equivalents, beginning of period	15,930	13,469
Cash and cash equivalents, end of period	$ 13,751	$ 11,797