CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011
Cash flows from operating activities:
Net income	$ 56,473	$ 30,814
Reconciling items:
Depreciation and amortization	5,200	4,114
Amortization of intangible assets	2,632	2,613
Share-based compensation expense	892	1,379
Equity in losses of affiliate	579
Bad debt expense	852	684
Deferred income taxes		634
Loss on sale or disposal of fixed assets	366
Changes in operating assets and liabilities:
Accounts receivable	(19,168)	424
Prepaid expenses and other current assets	(743)	6,590
Other assets	876	(2,288)
Accounts payable and accrued expenses	5,873	(4,172)
Other current and non-current liabilities	217	(2,630)
Net cash flows provided by operating activities	54,049	38,162
Cash flows from investing activities:
Additions to premises and equipment	(21,128)	(3,419)
Acquisition of business, net of cash acquired		(1,785)
Investment in equity affiliate		(3,328)
Change in restricted cash		(177)
Net cash flows used in investing activities	(21,128)	(8,709)
Cash flows from financing activities:
Principal payments on capital lease obligations	(318)	(340)
Proceeds from stock option exercises	2,018	510
Purchase of treasury stock	(16,781)	(12,546)
Contributions from non-controlling interests	24	14
Distributions to non-controlling interests	(4,830)	(4,193)
Net cash flows used in financing activities	(19,887)	(16,555)
Net increase in cash and cash equivalents	13,034	12,898
Cash and cash equivalents at the beginning of the period	32,125	22,134
Cash and cash equivalents at the end of the period	45,159	35,032
Supplemental cash flow information
Interest paid	28	46
Income taxes paid (refunded), net	1,255	(3,342)
Non-cash investing and financing activities
Amortization of tax-deductible goodwill	$ 1,684	$ 1,076