Property and Equipment (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Property and Equipment [Line Items]
Land	$ 169,985	$ 167,037
Buildings and leasehold improvements	446,381	400,487
Furniture, fixtures, equipment and purchased software	253,668	233,447
Construction in progress	11,765	34,316
Property and equipment, at cost	881,799	835,287
Less accumulated depreciation and amortization	325,595	296,481
Property and equipment, net	$ 556,204	$ 538,806