Summary Financial Information (Statements of Operations) (Details) - USD ($)	3 Months Ended								12 Months Ended
	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2017	Mar. 31, 2016	Mar. 31, 2015
Net sales									$ 637,123,000	$ 597,103,000	$ 579,643,000
Cost of products sold									444,191,000	409,840,000	398,036,000
Gross profit	$ 50,335,000	$ 44,821,000	$ 49,729,000	$ 48,047,000	$ 48,393,000	$ 48,341,000	$ 46,945,000	$ 43,584,000	192,932,000	187,263,000	181,607,000
Selling expenses									77,319,000	72,858,000	69,819,000
General and administrative expenses									80,410,000	68,811,000	54,874,000
Impairment of intangible asset									1,125,000	0	0
Amortization of intangibles									8,105,000	5,024,000	2,266,000
Income from operations	$ (3,164,000)	$ 5,317,000	$ 12,619,000	$ 11,201,000	$ 11,809,000	$ 10,958,000	$ 6,512,000	$ 11,291,000	25,973,000	40,570,000	54,648,000
Interest and debt expense									10,966,000	7,904,000	12,390,000
Investment (income) loss, net									(462,000)	(796,000)	(2,725,000)
Foreign currency exchange loss (gain), net									1,232,000	2,215,000	863,000
Other income, net									(93,000)	(377,000)	(462,000)
Income from continuing operations before income tax expense									13,027,000	31,624,000	36,015,000
Income tax expense									4,043,000	12,045,000	8,825,000
Income from continuing operations											27,190,000
Net income									$ 8,984,000	$ 19,579,000	$ 27,190,000