Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015
Cash flows provided by (used in) operating activities:
Net income (loss)	$ 32,301	$ (76,064)
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:
Depreciation and amortization expense	61,186	59,567
Amortization of deferred financing costs and original issuance discounts	3,821	39,225
Provision (credit) for doubtful accounts	429	(10)
Deferred income tax expense (benefit)	933	(5,994)
Deferred rent	12,240	9,580
Undistributed loss in unconsolidated joint venture	380	377
Loss (gain) on sale of assets	14	(2,488)
Equity based compensation	2,829	2,094
Changes in operating assets and liabilities, net of effects of acquired businesses:
Increase in accounts receivable	(46,576)	(50,034)
Increase in inventories	(108,882)	(104,968)
Increase in prepaid expenses and other current assets	(15,046)	(12,178)
Increase (decrease) in accounts payable, accrued expenses and income taxes payable	79,848	(23,656)
Net cash provided by (used in) operating activities	23,477	(164,549)
Cash flows used in investing activities:
Cash paid in connection with acquisitions, net of cash acquired	(31,820)	(18,405)
Capital expenditures	(57,324)	(62,032)
Proceeds from disposal of property and equipment	31	604
Net cash used in investing activities	(89,113)	(79,833)
Cash flows provided by financing activities:
Repayment of loans, notes payable and long-term obligations	(28,158)	(2,327,517)
Proceeds from loans, notes payable and long-term obligations	97,943	2,198,600
Cash held in escrow in connection with acquisitions	0	(3,832)
Issuance of common stock	0	397,159
Excess tax benefit from stock options	526	0
Exercise of stock options	1,281	30
Debt issuance costs	(44)	(11,248)
Net cash provided by financing activities	71,548	253,192
Effect of exchange rate changes on cash and cash equivalents	(1,214)	(2,219)
Net increase in cash and cash equivalents	4,698	6,591
Cash and cash equivalents at beginning of period	42,919	47,214
Cash and cash equivalents at end of period	47,617	53,805
Cash paid during the period
Interest	71,095	127,367
Income taxes, net of refunds	$ 26,103	$ 36,675