CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED) (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013
Cash flows from operating activities:
Net income	$ 114,170	$ 112,138
Adjustments to reconcile net income to net cash provided by operating activities:
Amortization	38,499	32,282
Depreciation	9,882	8,430
Non-cash stock-based compensation	13,509	7,473
Change in estimated acquisition earn-out payables	6,260	2,178
Deferred income taxes	14,425	20,922
Income tax benefit from exercise of shares from the stock benefit plans	(2,467)	(307)
Net gain on sales of investments, fixed assets and customer accounts	(2,804)	(974)
Payments on acquisition earn-outs in excess of original estimated payables	(2,539)	(1,926)
Changes in operating assets and liabilities, net of effect from acquisitions and divestitures:
Restricted cash and investments (increase)	(50,345)	(45,974)
Premiums, commissions and fees receivable (increase)	(21,396)	(6,307)
Reinsurance recoverables (increase)	(2,871)
Prepaid reinsurance premiums (increase)	(20,007)
Other assets (increase)	(37,173)	(1,386)
Premiums payable to insurance companies increase	74,646	69,008
Premium deposits and credits due customers increase (decrease)	17,542	(1,651)
Losses and loss adjustment expense increase	2,871
Unearned premiums increase	20,007
Accounts payable increase	35,461	6,725
Accrued expenses and other liabilities (decrease) increase	(34,714)	27,517
Other liabilities (decrease)	(18,232)	(6,263)
Net cash provided by operating activities	177,602	221,885
Cash flows from investing activities:
Additions to fixed assets	(12,577)	(7,123)
Payments for businesses acquired, net of cash acquired	(694,737)	(14,384)
Proceeds from sales of fixed assets and customer accounts	3,207	513
Purchases of investments	(8,515)	(9,935)
Proceeds from sales of investments	8,371	5,914
Net cash used in investing activities	(704,251)	(25,015)
Cash flows from financing activities:
Proceeds from long-term debt	550,000
Payments on long-term debt	(230,000)	(60)
Payments on acquisition earn-outs	(8,890)	(6,153)
Borrowings on revolving credit facilities	375,000
Income tax benefit from exercise of shares from the stock benefit plans	2,467	307
Issuances of common stock for employee stock benefit plans	942	725
Repurchase stock benefit plan shares for employees to fund tax withholdings	(2,648)	(73)
Purchase of treasury stock	(25,025)
Cash dividends paid	(29,042)	(25,912)
Net cash provided by (used in) financing activities	632,804	(31,166)
Net increase in cash and cash equivalents	106,155	165,704
Cash and cash equivalents at beginning of period	202,952	219,821
Cash and cash equivalents at end of period	$ 309,107	$ 385,525