CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016
Cash flows from operating activities:
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	$ 21,141	$ 18,104
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	11,397	11,134
Amortization of deferred loan costs	403	275
Stock-based compensation	5,199	983
Excess tax benefit from stock-based compensation		(425)
Provision for bad debts	152	92
Loss (gain) on disposition of assets	4	668
Changes in operating assets and liabilities:
Receivables	(1,933)	(981)
Income taxes receivable	(451)	94
Inventories	(13)	74
Prepaid expenses	(112)	(879)
Accounts payable	(373)	611
Accrued expenses	(669)	(575)
Net cash provided by operating activities	34,745	29,175
Cash flows from investing activities:
Proceeds from sale of assets	86	16
Change in construction payable	2,144	(194)
Acquisition of property and equipment	(36,537)	(19,646)
Net cash used in investing activities	(34,307)	(19,824)
Cash flows from financing activities:
Net exercise of stock options		2,100
Excess tax benefit from stock-based compensation		425
Principal payments on long-term debt		(11,000)
Loan issuance cost		(2,586)
Net cash used in financing activities		(11,061)
Net increase (decrease) in cash	438	(1,710)
Cash and cash equivalents at beginning of period	26,383	21,164
Cash and cash equivalents at end of period	26,821	19,454
Supplemental disclosure of cash flow information
Cash paid for interest, net of amounts capitalized	235
Cash paid for income taxes	11,200	$ 9,475
Return of assets under capital lease:
Accounts Payable	(105)
Accrued Expenses	$ (13)