CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Cash flows from operating activities:
Net income	$ 84,235	$ 20,745	$ 27,530
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation, amortization and accretion	13,970	16,677	15,167
Amortization of deferred financing costs	0	456	258
Deferred income (benefit) tax expense	(59,007)	4,740	16,276
Stock based compensation	1,868	3,838	3,045
Provisions for doubtful accounts, service credits and other	1,290	1,128	1,955
Adjustments of non-cash transaction taxes	(686)	(310)	(474)
(Gain)/Loss on disposals of property and equipment	(793)	3	21
Changes in assets and liabilities:
Accounts receivable	1,041	(8,013)	1,542
Prepaid expenses, intangible assets and other assets	658	17	(1,215)
Accounts payable, accrued liabilities and other	(7,381)	1,192	(6,855)
Customer deposits and deferred revenue	2,817	1,086	(6,794)
Net cash provided by operating activities	38,012	41,559	50,456
Cash flows from investing activities:
Purchases of property and equipment	(6,374)	(7,679)	(10,408)
Proceeds from disposals of property and equipment	809	65	293
Net cash used in investing activities	(5,565)	(7,614)	(10,115)
Cash flows from financing activities:
Cash distributions to stockholders	(13,976)	(10,826)	(12,312)
Purchase of common stock (including commissions)	(15,008)	(4,325)	0
Net cash used in financing activities	(28,984)	(15,151)	(12,312)
Net increase in cash and cash equivalents	3,463	18,794	28,029
Cash and cash equivalents, beginning of period	107,869	89,075	61,046
Cash and cash equivalents, end of period	111,332	107,869	89,075
Supplemental disclosure:
Interest paid	3	8	10
Income taxes paid	$ 1,521	$ 1,448	$ 1,474