Condensed Consolidated Statements of Cash Flows (Unaudited) (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013
Operating Activities
Net income	$ 88,726	$ 78,928
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation	6,512	5,126
Amortization of intangible assets	10,444	12,530
Amortization of original issue discount	1,514	1,138
Amortization of deferred financing costs	1,507	1,189
Amortization of unrealized loss on interest rate swaps		2,005
Loss on extinguishment of debt		15,336
Gain on change in contractual interest rate	(16,014)
Gain in remeasurement of contingent consideration	(4,877)
Provision for losses on accounts receivable	115	636
Deferred income taxes	28,145	35,324
Loss on disposal of property and equipment	95	36
Share-based compensation expense	6,203	6,192
Net changes in operating assets and liabilities:
Accounts receivable	(38,924)	(36,908)
Inventories	12,460	(62,561)
Other assets	839	182
Accounts payable	6,717	18,984
Accrued wages and employee benefits	(10,427)	1,452
Other accrued liabilities	(521)	3,130
Excess tax benefits from equity awards	(7,229)	(8,401)
Net cash provided by operating activities	85,285	74,318
Investing Activities
Proceeds from sale of property and equipment	7	35
Expenditures for property and equipment	(13,317)	(10,051)
Proceeds from sale of business, net		2,254
Acquisition of business	(429)	6,278
Net cash used in investing activities	(13,739)	(1,484)
Financing Activities
Proceeds from short-term borrowings	4,000	14,007
Proceeds from long-term borrowings		1,200,000
Repayments of short-term borrowings	(7,066)	(2,510)
Repayments of long-term borrowings and capital lease obligations	(18,567)	(897,750)
Payment of debt issuance costs	(4)	(21,698)
Cash dividends paid	(459)	(343,421)
Taxes paid related to the net share settlement of equity awards	(8,950)	(11,259)
Excess tax benefits from equity awards	7,229	8,401
Net cash used in financing activities	(23,817)	(54,230)
Effect of exchange rate changes on cash and cash equivalents	83	(29)
Net increase in cash and cash equivalents	47,812	18,575
Cash and cash equivalents at beginning of period	150,147	108,023
Cash and cash equivalents at end of period	$ 197,959	$ 126,598