Selected Quarterly Financial Data (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Selected Quarterly Financial Information [Abstract]
Net sales	$ 301,157	$ 323,674	$ 322,006	$ 302,293	$ 314,446	$ 320,946	$ 304,085	$ 274,512	$ 1,249,130	$ 1,213,989	$ 1,054,204
Gross profit	109,362	122,046	121,988	112,411	114,199	115,214	107,268	98,595	465,807	435,276	356,776
Net income (loss) attributable to common shareholders	$ 47,190	$ 38,060	$ 36,284	$ 31,716	$ 29,519	$ 30,908	$ 25,068	$ 18,526	$ 153,250	$ 104,021	$ (1,805)
Earnings (loss) per share attributable to common shareholders
Basic	$ 0.92	$ 0.75	$ 0.72	$ 0.63	$ 0.59	$ 0.62	$ 0.50	$ 0.38	$ 3.02	$ 2.09	$ (0.04)
Diluted	$ 0.90	$ 0.73	$ 0.70	$ 0.62	$ 0.58	$ 0.61	$ 0.49	$ 0.37	$ 2.96	$ 2.04	$ (0.04)