Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Operating activities
Net income	$ 324,643	$ 56,913	$ 43,055
Adjustment to reconcile net income to net cash provided by operating activities:
Depreciation	8,103	7,632	7,715
Amortization	48,020	51,808	51,960
Trade name write-down	9,389	0	0
Gain on extinguishment of debt	0	0	(14,745)
Amortization of deferred finance costs	1,986	2,439	3,417
Write-off of deferred financing costs related to debt extinguishment	377	4,809	0
Amortization of unrealized loss on interest rate swaps	0	0	24,222
Provision for losses on accounts receivable	(7)	(124)	227
Deferred income taxes	(238,170)	0	0
Loss on disposal of property and equipment	10	56	41
Share-based compensation expense	8,646	6,363	38
Net changes in operating assets and liabilities, net of effects from acquisitions:
Accounts receivable	(22,235)	(8,621)	11,779
Inventories	(11,224)	(3,151)	280
Other assets	(6,834)	1,177	(1,739)
Accounts payable	18,517	7,896	(20,886)
Accrued wages and employee benefits	6,516	(197)	1,280
Other accrued liabilities	21,975	(12,519)	(32,037)
Net cash provided by operating activities	169,712	114,481	74,607
Investing activities
Proceeds from sale of property and equipment	14	76	69
Expenditures for property and equipment	(12,060)	(9,631)	(4,525)
Collections on receivable notes	0	0	105
Acquisition of business, net of cash acquired	(83,907)	(1,649)	0
Net cash used in investing activities	(95,953)	(11,204)	(4,351)
Financing activities
Stockholders' contributions of capital - Series A preferred stock	0	0	20,000
Payment of expenses incurred in advance of stock issuance	0	0	(678)
Proceeds from issuance of common stock	0	248,309	0
Excess tax benefits from equity awards	200	0	0
Taxes paid related to the net share settlement of equity awards	(371)	0	0
Proceeds from exercise of stock options	310	0	0
Payment of long-term debt	(59,355)	(434,310)	(9,500)
Net cash provided by (used in) financing activities	(59,216)	(186,001)	9,822
Net increase (decrease) in cash and cash equivalents	14,543	(82,724)	80,078
Cash and cash equivalents at beginning of period	78,583	161,307	81,229
Cash and cash equivalents at end of period	93,126	78,583	161,307
Supplemental disclosure of cash flow information Cash paid during the period
Interest	24,264	36,796	75,601
Income taxes	437	322	383
Supplemental disclosure of noncash financing and investing activities
Contributions of capital related to debt extinguishment	$ 0	$ 0	$ 14,754