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	$ 3,444	$ 3,917
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation, amortization and accretion	3,323	3,747
Deferred income tax expense	2,327	1,997
Amortization of stock based compensation	637	443
Provision for doubtful accounts, service credits and other	238	327
Adjustment of non-cash transaction taxes	(81)	(49)
(Gain) Loss on disposals of property and equipment	0	(18)
Changes in assets and liabilities:
Accounts receivable	1,322	1,268
Prepaid expenses and other assets	595	54
Accounts payable, accrued liabilities and accrued compensation and benefits	(2,667)	(5,791)
Deferred revenue and customer deposits	367	530
Other long-term liabilities	14	0
Net cash provided by operating activities	9,519	6,425
Cash flows from investing activities:
Purchase of property and equipment	(1,445)	(1,040)
Proceeds from disposals of property and equipment	0	30
Net cash used in investing activities	(1,445)	(1,010)
Cash flows from financing activities:
Cash dividends to stockholders	(2,580)	(3,356)
Purchase of common stock	(4,905)	(466)
Employee stock based compensation tax withholding	0	(3,825)
Net cash used in financing activities	(7,485)	(7,647)
Net increase (decrease) in cash and cash equivalents	589	(2,232)
Cash and cash equivalents, beginning of period	111,332	107,869
Cash and cash equivalents, end of period	111,921	105,637
Supplemental disclosure:
Income taxes paid	$ 352	$ 337