Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017	Mar. 31, 2017
Current assets
Cash and cash equivalents	$ 4,993	$ 26,049	$ 64,381
Accounts receivable, net of allowances of $2,470, $2,054, and $1,536 at March 31, 2018, March 31, 2017, and December 31, 2017, respectively	178,337	82,157	131,108
Inventories, net	323,945	274,748	189,020
Prepaid expenses and other current assets	37,802	34,125	37,456
Total current assets	545,077	417,079	421,965
Fixed assets, net	266,596	228,950	178,922
Goodwill	147,291	124,183	98,105
Other intangible assets, net	180,691	130,132	114,311
Deferred taxes	17,115	24,156	26,882
Other assets	22,120	21,358	12,616
Total assets	1,178,890	945,858	852,801
Current liabilities
Accounts payable, trade	97,606	79,164	70,225
Accrued expenses and other current liabilities	109,818	102,849	101,020
Total current liabilities	207,424	182,013	171,245
Long-term indebtedness	226,242	49,924	49,905
Other long-term liabilities	66,433	61,176	47,171
Total liabilities	500,099	293,113	268,321
Stockholders’ equity
Common stock, par value $.01 per share	279	277	276
Paid-in capital	195,765	203,990	189,536
Retained earnings	508,665	475,506	425,584
Accumulated other comprehensive income (loss)	3,549	2,439	(1,449)
Stockholders’ equity before treasury stock	708,258	682,212	613,947
Treasury stock, at cost	(29,467)	(29,467)	(29,467)
Total stockholders’ equity	678,791	652,745	584,480
Total liabilities and stockholders’ equity	$ 1,178,890	$ 945,858	$ 852,801