CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012
Cash flows from operating activities:
Net income	$ 169,887	$ 141,408
Adjustments to reconcile net income to net cash provided by operating activities:
Amortization	50,140	47,450
Depreciation	12,896	11,383
Non-cash stock-based compensation	14,904	11,393
Change in estimated acquisition earn-out payables	1,513	(134)
Deferred income taxes	31,000	30,233
Income tax benefit from exercise of shares from the stock benefit plans	(562)	(279)
Net gain on sales of investments, fixed assets and customer accounts	(1,417)	(2,692)
Payments on acquisition earn-outs in excess of original estimated payables	(2,788)	(1,693)
Changes in operating assets and liabilities, net of effect from acquisitions and divestitures:
Restricted cash and investments (increase)	(82,751)	(67,602)
Premiums, commissions and fees receivable (increase) decrease	(18,097)	8,798
Other assets decrease	11,200	3,400
Premiums payable to insurance companies increase (decrease)	9,894	(12,999)
Premium deposits and credits due customers increase	60,548	17,698
Accounts payable increase	3,541	23,677
Accrued expenses and other liabilities increase (decrease)	57,527	(1,982)
Other liabilities (decrease)	(7,531)	(19,083)
Net cash provided by operating activities	309,904	188,976
Cash flows from investing activities:
Additions to fixed assets	(11,453)	(18,915)
Payments for businesses acquired, net of cash acquired	(339,352)	(384,596)
Proceeds from sales of fixed assets and customer accounts	867	5,239
Purchases of investments	(13,235)	(6,152)
Proceeds from sales of investments	9,726	5,645
Net cash used in investing activities	(353,447)	(398,779)
Cash flows from financing activities:
Payments on acquisition earn-outs	(7,810)	(2,695)
Proceeds from long-term debt	30,000	200,000
Payments on long-term debt	(93)	(1,227)
Borrowings on revolving credit facilities	31,863	100,000
Payments on revolving credit facilities	(31,863)	(100,000)
Income tax benefit from exercise of shares from the stock benefit plans	562	279
Issuances of common stock for employee stock benefit plans	11,286	9,590
Repurchase stock benefit plan shares for employees to fund tax withholdings	(245)	(1,221)
Cash dividends paid	(39,013)	(36,591)
Net cash (used in) provided by financing activities	(5,313)	168,135
Net (decrease) in cash and cash equivalents	(48,856)	(41,668)
Cash and cash equivalents at beginning of period	219,821	286,305
Cash and cash equivalents at end of period	$ 170,965	$ 244,637