CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011
Cash flows from operating activities:
Net income	$ 84,557	$ 49,776
Reconciling items:
Depreciation and amortization	9,038	6,174
Amortization of intangible assets	3,833	3,952
Share-based compensation expense	2,038	2,109
Equity in losses of affiliate	872	355
Bad debt expense	1,170	999
Deferred income taxes		(32)
Loss on sale or disposal of fixed assets	401
Changes in operating assets and liabilities:
Accounts receivable	(11,662)	2,546
Prepaid expenses and other current assets	(4,058)	5,066
Other assets	809	(4,109)
Accounts payable and accrued expenses	10,405	71
Other current and non-current liabilities	(266)	1,844
Net cash flows provided by operating activities	97,137	68,751
Cash flows from investing activities:
Additions to premises and equipment	(24,199)	(11,291)
Acquisition of business, net of cash acquired		(2,515)
Investment in equity affiliate		(15,000)
Change in restricted cash		(177)
Net cash flows used in investing activities	(24,199)	(28,983)
Cash flows from financing activities:
Principal payments on capital lease obligations	(491)	(544)
Proceeds from stock option exercises	2,619	775
Purchase of treasury stock	(16,781)	(35,471)
Contributions from non-controlling interests	27	31
Distributions to non-controlling interests	(6,008)	(5,443)
Net cash flows used in financing activities	(20,634)	(40,652)
Net increase in cash and cash equivalents	52,304	(884)
Cash and cash equivalents at the beginning of the period	32,125	22,134
Cash and cash equivalents at the end of the period	84,429	21,250
Supplemental cash flow information
Interest paid	39	65
Income taxes paid (refunded), net	2,252	(2,684)
Non-cash investing and financing activities
Amortization of tax-deductible goodwill	2,524	2,591
Premises and equipment purchased on account	$ 5,992