Unaudited Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Cash flows from operating activities:
Net income (loss)	$ 3,111	$ (240)
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation and amortization	7,384	7,163
Amortization of debt costs and discounts	784	720
(Gain) loss on sale of property and equipment	(5)	5
Share-based compensation	374	162
Deferred income taxes	1,616	3,366
Changes in operating assets and liabilities:
Accounts receivable, net	582	153
Prepaid expense	520	801
Inventory	58	235
Other assets	68	(1)
Accounts payable	(2,271)	562
Accrued interest	4,527	4,501
Accrued expense	(958)	647
Income tax receivable	0	95
Other liabilities	(11)	(8)
Net cash provided by operating activities	15,779	18,161
Cash flows from investing activities:
Proceeds from sale of property and equipment	17	1
Purchases of property and equipment	(4,482)	(3,125)
Net cash used in investing activities	(4,465)	(3,124)
Cash flows from financing activities:
Payment on long-term debt	(8)	(8)
Repurchases of vested share-based awards	(73)	(47)
Net cash used in financing activities	(81)	(55)
Net increase in cash and cash equivalents	11,233	14,982
Cash and cash equivalents:
Beginning of period	157,779	135,175
End of period	169,012	150,157
Supplemental cash flow information:
Cash paid during the period for interest	2,432	2,431
Supplemental schedule of non-cash investing and financing activities:
Purchase of property and equipment financed through accounts payable	$ 311	$ 316