CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Cash flows from operating activities:
Net income	$ 7,015	$ 6,741
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	3,603	3,692
Amortization of deferred loan costs	134	135
Stock-based compensation	1,960	1,115
Recoveries for bad debts	(26)	(32)
Changes in operating assets and liabilities:
Receivables	1,378	1,383
Income taxes	1,706	1,736
Inventories	75	91
Prepaid expenses	817	99
Right of use asset, net	3
Accounts payable	(1,660)	534
Accrued expenses	(1,537)	(2,467)
Net cash provided by operating activities	13,468	13,027
Cash flows from investing activities:
Change in construction payable	2,084	5,394
Acquisition of property and equipment	(38,217)	(18,204)
Net cash used in investing activities	(36,133)	(12,810)
Cash flows from financing activities:
Long-term debt borrowings	16,020
Net cash provided by financing activities	16,020
Change in cash	(6,645)	217
Cash and cash equivalents at beginning of period	30,462	29,151
Cash and cash equivalents at end of period	$ 23,817	29,368
ASC 606 Changes | ASU 2014-09
Adjustment to beginning retained earnings for accounting changes in accordance with the new revenue recognition standard
Accrued expenses		$ 4,858