Acquisitions (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2012	Mar. 31, 2011
Fair value of consideration transferred:
Cash	$ 138,908	$ 814
Contingent consideration	602
Total fair value of consideration transferred	139,510	814
Recognized amounts of identifiable assets acquired and liabilities assumed associated with businesses acquired:
Accounts receivable	6,315	183
Other current assets	603	3
Property and equipment	22,450	106
Long-term franchise agreements and contracts	5,521
Customer lists	19,011	194
Indefinite-lived intangibles	35,345
Accounts payable	(1,982)	(46)
Accrued liabilities	(1,143)	(32)
Deferred revenue	(4,885)	(374)
Other long-term liabilities	(1,362)
Total identifiable net assets	79,873	34
Goodwill	$ 59,637	$ 780