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	$ 4,896	$ 797	$ 56,689
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	70,527	69,481	64,358
Amortization of debt discount and premium	171	1,976	6,086
Equity-based compensation expense (net of amounts capitalized)	11,515	9,571	8,719
Loss on Debt extinguishment and redemption	10,144
Gains on Lease terminations	(11,643)
Gain-equipment transactions and other, net	(4,866)	(10,382)	(1,001)
Deferred Income Tax Expense (Benefit)	7,709	3,163	(50,069)
Changes in operating assets and liabilities:
Accounts receivable	1,119	(3,938)	(6,293)
Prepaid expenses and other current assets	(2,898)	(2,338)	(3,642)
Deposits and other assets	(221)	219	770
Accounts payable, accrued liabilities and other long-term liabilities	(2,644)	4,497	6,234
Net cash provided by operating activities	83,809	73,046	81,851
Cash flows from investing activities:
Purchases of property and equipment	(35,582)	(60,032)	(49,031)
Proceeds from asset sales	111	90	50
Net cash used in investing activities	(35,471)	(59,942)	(48,981)
Cash flows from financing activities:
Net proceeds from issuance of 2021 unsecured notes - net of debt costs of $4,176		195,824
Redemption of 2018 notes	(251,280)
Repayment of convertible senior notes		(91,978)
Dividends paid	(66,314)	(54,216)	(35,352)
Principal payments of capital lease obligations	(20,215)	(18,208)	(11,164)
Principal payments of installment payment agreement	(670)
Purchases of common stock	(39,394)	(58,582)
Proceeds from exercises of stock options	423	533	1,218
Net cash (used in) provided by financing activities	(128,847)	(26,627)	24,584
Effect of exchange rates changes on cash	(3,690)	(3,553)	127
Net (decrease) increase in cash and cash equivalents	(84,199)	(17,076)	57,581
Cash and cash equivalents, beginning of period	287,790	304,866	247,285
Cash and cash equivalents, end of period	203,591	287,790	304,866
Supplemental disclosure of cash flow information:
Cash paid for interest	44,383	46,531	34,511
Cash paid for income taxes	577	1,896	822
Non-cash investing and financing activities:
Capital lease obligations incurred	25,794	28,707	33,428
PP&E obtained for installment payment agreement	21,873
Fair value of equipment acquired in leases	595	174	8,029
Non-cash component of network equipment obtained in exchange transactions	8,156	$ 11,031	934
Senior Secured 2022 Notes Member
Cash flows from financing activities:
Net proceeds from issuance of senior secured notes - net of debt costs	$ 248,603
Senior Secured 2018 Notes Member
Cash flows from financing activities:
Net proceeds from issuance of senior secured notes - net of debt costs			$ 69,882