Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014
Cash flows provided by operating activities:
Net income	$ 93,297	$ 78,373
Adjustments to reconcile net income to net cash provided by operating activities:
Share-based compensation	8,423	7,412
Excess tax benefits from share-based compensation	(3,343)	(7,232)
Provision for bad debts	11,412	10,835
Depreciation and amortization	25,360	21,418
Deferred income taxes	(1,305)	(137)
Prepaid royalty impairment		966
Other, including fixed asset impairments	2,098	2,475
Changes in assets and liabilities:
Restricted cash, cash equivalents and investments	3,103	5,567
Accounts receivable	(13,307)	(11,907)
Prepaid expenses and other	(1,549)	(317)
Due to/from related parties	(21)	17
Accounts payable	1,400	(2,956)
Accrued liabilities and employee related liabilities	(1,181)	(1,610)
Income taxes receivable/payable	(791)	18,782
Deferred rent	(824)	(2,736)
Deferred revenue	49,844	44,092
Student deposits	(3,606)	(6,300)
Net cash provided by operating activities	169,010	156,742
Cash flows used in investing activities:
Capital expenditures	(169,706)	(141,217)
Purchases of investments	(35,547)	(101,185)
Proceeds from sale or maturity of investments	52,315	82,479
Net cash used in investing activities	(152,938)	(159,923)
Cash flows (used in) provided by financing activities:
Principal payments on notes payable and capital lease obligations	(5,117)	(5,021)
Repurchase of common shares including shares withheld in lieu of income taxes	(4,230)	(5,338)
Excess tax benefits from share-based compensation	3,343	7,232
Net proceeds from exercise of stock options	2,871	6,966
Net cash (used in) provided by financing activities	(3,133)	3,839
Net increase in cash and cash equivalents	12,939	658
Cash and cash equivalents, beginning of period	65,238	55,824
Cash and cash equivalents, end of period	78,177	56,482
Supplemental disclosure of cash flow information
Cash paid for interest	849	1,327
Cash paid for income taxes	54,408	29,223
Cash received for income tax refunds	2	364
Supplemental disclosure of non-cash investing and financing activities
Purchases of property and equipment included in accounts payable	23,212	11,650
Purchases of equipment through capital lease and note payable obligations	1,257
Tax benefit of Spirit warrant intangible	190	195
Shortfall tax expense from share-based compensation	$ 18	$ 14