Condensed Consolidated Statement of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015
Operating activities
Net income (loss)	$ (836)	$ 262,845
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation and amortization	70,862	63,083
Deferred income tax (benefit) provision	3,789	(13,032)
Loss on disposal of assets	5,403	5,588
Bad debt allowance	(120)	(27)
Stock-based compensation expense	30,038	38,729
Excess tax benefit on stock-based compensation	(1,982)	(58,058)
Other	(352)	229
Changes in operating assets and liabilities:
Accounts receivable	15,201	9,093
Inventory	(1,921)	(1,205)
Prepaid expenses and other current assets	(12,267)	(4,915)
Other assets	1,832	(4,483)
Accounts payable	(13,675)	14,111
Accrued liabilities	31,973	5,083
Income tax payable/receivable	34,919	66,694
Deferred rent	16,944	13,512
Other long-term liabilities	(143)	3,883
Net cash provided by operating activities	179,665	401,130
Investing activities
Purchases of leasehold improvements, property and equipment	(126,712)	(114,395)
Purchases of investments	0	(273,907)
Maturities of investments	45,000	216,000
Proceeds from Sale of Investments	540,648	0
Net cash provided by (used in) investing activities	458,936	(172,302)
Financing activities
Acquisition of treasury stock	(700,036)	(116,322)
Excess tax benefit on stock-based compensation	1,982	58,058
Stock plan transactions and other financing activities	12	(175)
Net cash used in financing activities	(698,042)	(58,439)
Effect of exchange rate changes on cash and cash equivalents	1,396	(2,169)
Net change in cash and cash equivalents	(58,045)	168,220
Cash and cash equivalents at beginning of period	248,005	419,465
Cash and cash equivalents at end of period	$ 189,960	$ 587,685