Supplemental Guarantor Information (Supplemental Condensed Consolidated Balance Sheet) (Details) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014	Sep. 30, 2014	Dec. 31, 2013
Assets
Cash and cash equivalents	$ 12,785	$ 33,462	$ 101,704	$ 109,998
Accounts receivable	29,561	13,799
Inventories	741,554	556,323
Prepaid expenses and other assets	36,634	28,796
Property and equipment, net	7,365	12,471
Deferred tax asset, net	5,363	1,359
Amortizable intangible assets, net	5,428	8,632
Goodwill	21,365	21,137
Total Assets	860,055	675,979
Liabilities:
Accounts payable	8,303	17,135
Accrued expenses and other liabilities	94,484	64,029
Notes payable and revolving line of credit	362,326	229,610
Total liabilities	465,113	310,774
Total stockholders' equity	394,942	365,205
Total liabilities and stockholders' equity	860,055	675,979
Parent [Member]
Assets
Cash and cash equivalents	4,155	22,710	93,797	106,614
Accounts receivable	2,260	1,202
Investment in subsidiaries	743,534	558,177
Prepaid expenses and other assets	9,348	7,286
Property and equipment, net	802	641
Deferred tax asset, net	5,363	1,359
Total Assets	765,462	591,375
Liabilities:
Accounts payable	121	70
Accrued expenses and other liabilities	12,622	7,495
Notes payable and revolving line of credit	357,777	218,605
Total liabilities	370,520	226,170
Total stockholders' equity	394,942	365,205
Total liabilities and stockholders' equity	765,462	591,375
Guarantor Subsidiaries [Member]
Assets
Cash and cash equivalents	8,630	10,752	$ 7,907	$ 3,384
Accounts receivable	27,301	12,597
Inventories	741,554	556,323
Prepaid expenses and other assets	27,286	21,510
Property and equipment, net	6,563	11,830
Amortizable intangible assets, net	5,428	8,632
Goodwill	21,365	21,137
Total Assets	838,127	642,781
Liabilities:
Accounts payable	8,182	17,065
Accrued expenses and other liabilities	81,862	56,534
Notes payable and revolving line of credit	4,549	11,005
Total liabilities	94,593	84,604
Total stockholders' equity	743,534	558,177
Total liabilities and stockholders' equity	838,127	642,781
Elimination Entries [Member]
Assets
Investment in subsidiaries	(743,534)	(558,177)
Total Assets	(743,534)	(558,177)
Liabilities:
Total stockholders' equity	(743,534)	(558,177)
Total liabilities and stockholders' equity	$ (743,534)	$ (558,177)