Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Current assets:
Cash and cash equivalents	$ 120,550	$ 114,901
Accounts receivable, net of allowance of $9,425 in 2013 and $11,106 in 2012	12,211	10,428
Prepaid expenses	5,056	4,290
Income tax receivable	386	4,953
Deferred income taxes	5,113	6,502
Total current assets	143,316	141,074
Property and equipment, net	85,607	82,840
Note receivable	6,000	6,000
Investments	10,616	6,664
Other assets, net	1,201	1,025
Total assets	246,740	237,603
Current liabilities:
Accounts payable	15,247	17,251
Accrued liabilities	11,657	12,042
Deferred revenue and student deposits	29,073	25,777
Total current liabilities	55,977	55,070
Deferred income taxes	12,113	11,380
Total liabilities	68,090	66,450
Commitments and contingencies (Note 2)
Stockholders' equity:
Preferred stock, $.01 par value; Authorized shares - 10,000; no shares issued or outstanding
Common stock, $.01 par value; Authorized shares - 100,000; 17,667 issued and outstanding in 2013; 17,752 issued and outstanding in 2012	177	178
Additional paid-in capital	158,561	157,449
Retained earnings	19,912	13,526
Total stockholders' equity	178,650	171,153
Total liabilities and stockholders' equity	$ 246,740	$ 237,603