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CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
CASH FLOWS FROM OPERATING ACTIVITIES:      
Net (loss) income $ (142,796) $ 18,573 $ 157,773
Adjustments to reconcile net (loss) income to net cash (used in) provided by operating activities:      
Goodwill and asset impairment 127,007 191,524 71,829
Loss on sale of student receivables 720 0 0
Depreciation and amortization expense 81,813 85,367 71,624
Bad debt expense 40,022 55,721 106,324
Compensation expense related to share-based awards 9,687 14,831 17,318
Gain on sale of business 0 (27,085) 0
Gain on bargain purchase (669) 0 0
Loss (gain) on disposition of property and equipment 301 (1,711) 457
Deferred income taxes (42,014) 14,226 (17,007)
Changes in operating assets and liabilities      
Student receivables, gross 17,913 29,917 (30,105)
Allowance for doubtful accounts (57,908) (81,666) (68,815)
Other receivables, net (1,433) (738) (459)
Inventories, prepaid expenses, and other current assets 16,244 3,418 (1,542)
Deposits and other non-current assets 1,654 3,356 (1,794)
Accounts payable (11,984) (3,803) 4,364
Accrued expenses and deferred rent obligations (19,473) (74,075) (25,055)
Deferred tuition revenue (35,882) 2,595 (12,653)
Net cash (used in) provided by operating activities (16,798) 230,450 272,259
CASH FLOWS FROM INVESTING ACTIVITIES:      
Purchases of available-for-sale investments (147,085) (189,258) (291,864)
Sales of available-for-sale investments 246,464 188,322 332,445
Purchases of property and equipment (37,944) (78,333) (127,283)
Proceeds on the sale of assets 0 6,259 0
Proceeds on the sale of business, net of cash divested 0 16,670 0
Business acquisitions, net of acquired cash (1,721) (9,851) (6,194)
Other (1,359) (40) 88
Net cash provided by (used in) investing activities 58,355 (66,231) (92,808)
CASH FLOWS FROM FINANCING ACTIVITIES:      
Purchase of treasury stock (56,431) (150,445) (154,913)
Issuance of common stock 1,599 4,370 3,109
Tax benefit associated with stock option exercises 0 376 223
Payments of assumed loans upon business acquisition (318) 0 (4,279)
Payments of contingent consideration (5,818) (16,355) (16,852)
Borrowings from credit facility 80,000 0 0
Restricted cash (97,878) 0 0
Payments of capital lease obligations (844) (989) (1,013)
Net cash used in financing activities (79,690) (163,043) (173,725)
EFFECT OF FOREIGN CURRENCY EXCHANGE RATE CHANGES ON CASH AND CASH EQUIVALENTS: (1,837) (10,066) (1,316)
NET (DECREASE) INCREASE IN CASH AND CASH EQUIVALENTS (39,970) (8,890) 4,410
DISCONTINUED OPERATIONS CASH ACTIVITY INCLUDED ABOVE:      
Add: Cash balance of discontinued operations, beginning of the year 0 28,844 26,828
Less: Cash balance of discontinued operations, end of the year 62 0 28,844
CASH AND CASH EQUIVALENTS, beginning of the year 280,592 260,638 258,244
CASH AND CASH EQUIVALENTS, end of the year 240,560 280,592 260,638
Supplemental Cash Flow Information:      
Interest paid 205 116 162
Income taxes paid $ 19,102 $ 40,188 $ 103,306