CONDENSED CONSOLIDATED BALANCE SHEETS (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012	Jun. 30, 2012
Current assets:
Cash and cash equivalents	$ 182,568	$ 243,465	$ 161,198
Restricted cash	5,819	3,478	6,787
Accounts receivable, net	125,927	78,928	75,047
PEAKS Trust student loans, less allowance for loan losses of $0, $0 and $0	7,307	0	0
Deferred income taxes	68,215	44,547	16,859
Prepaid expenses and other current assets	20,015	16,162	14,571
Total current assets	409,851	386,580	274,462
Property and equipment, net	179,095	189,890	198,175
PEAKS Trust student loans, excluding current portion, less allowance for loan losses of $4,319, $0 and $0	101,375	0	0
Deferred income taxes	45,267	57,471	36,654
Other assets	31,990	41,263	49,360
Total assets	767,578	675,204	558,651
Current liabilities:
Current portion of PEAKS Trust senior debt	102,695	0	0
Accounts payable	63,719	63,304	80,777
Accrued compensation and benefits	26,219	21,023	25,711
Other current liabilities	43,177	106,796	33,091
Deferred revenue	113,891	135,900	121,873
Total current liabilities	349,701	327,023	261,452
Long-term debt	120,000	140,000	150,000
PEAKS Trust senior debt, excluding current portion	124,983	0	0
Other liabilities	43,208	82,416	63,169
Total liabilities	637,892	549,439	474,621
Shareholders' equity:
Preferred stock, $.01 par value, 5,000,000 shares authorized, none issued	0	0	0
Common stock, $.01 par value, 300,000,000 shares authorized, 37,068,904 issued	371	371	371
Capital surplus	195,141	197,113	189,267
Retained earnings	970,405	967,473	935,145
Accumulated other comprehensive (loss)	(7,787)	(7,930)	(9,147)
Treasury stock, 13,700,051; 13,744,395 and 13,749,764 shares, at cost	(1,028,444)	(1,031,262)	(1,031,606)
Total shareholders' equity	129,686	125,765	84,030
Total liabilities and shareholders' equity	$ 767,578	$ 675,204	$ 558,651