CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014
Cash flows from operating activities:
Net earnings (loss)	$ 4,133	$ (18,204)
Provision for depreciation, depletion, and amortization	31,168	30,788
Gain on sale of assets	(698)	(227)
Loss on early extinguishment of debt		14,350
Non-cash inventory, spare parts and other writedowns	69	211
Deferred income taxes	2,875	(10,628)
Other non-cash items	2,126	2,588
Changes in operating assets and liabilities
Receivables	(6,412)	3,808
Inventories	4,353	4,957
Other assets	(13,133)	(17,130)
Accounts payable and other	(12,510)	(20,619)
Net cash provided by (used in) operating activities	11,971	(10,106)
Cash flows from investing activities:
Capital expenditures	(6,622)	(12,831)
Proceeds from sale of assets	1,019	7,056
Net cash used in investing activities	(5,603)	(5,775)
Cash flows from financing activities:
Borrowings under credit agreements	11,500	171,500
Payments under credit agreements	(13,227)	(150,437)
Payments of debt issuance costs		(3,544)
Payments of premium on early extinguishment of debt		(13,833)
Proceeds from stock option exercises		1,450
Dividends paid	(4,505)	(4,482)
Net cash (used in) provided by financing activities	(6,232)	654
Net increase (decrease) in cash and cash equivalents	136	(15,227)
Cash and cash equivalents, beginning of period	2,675	19,594
Cash and cash equivalents, end of period	$ 2,811	$ 4,367