Long-Term Debt - Narrative (Details) (USD $)	3 Months Ended		12 Months Ended			9 Months Ended
	Mar. 31, 2014	Jun. 30, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Sep. 30, 2014	Feb. 17, 2007	Jan. 31, 2014
Debt Instrument [Line Items]
Write off of deferred debt issuance cost	$ 1,070,000	$ 1,216,000
Weighted average interest rate			2.87%	2.73%
Loss on debt extinguishment including debt finance charges and associated fees			0	0	(312,000)
Interest Paid			3,302,000	4,046,000	8,866,000
Long-term Debt, Fiscal Year Maturity [Abstract]
Year One			967,000
Year Two			5,076,000
Year Three			1,143,000
Year Four			637,000
Year Five			408,000
Convertible Subordinated Debt | Convertible senior subordinated debentures at 4.125%, due in February 2027
Debt Instrument [Line Items]
Write off of deferred debt issuance cost					11,000
Interest rate (as a percent)			4.125%
Repurchased and extinguished principal			500,000
Principal amount of liability component			13,350,000	13,350,000
Principal Amount							135,000,000
Principal in excess of if-converted value			4,624,000
Loss on debt extinguishment including debt finance charges and associated fees					(312,000)
Conversion par amount			1,000
Initial conversion price			$ 24.79
Conversion price premium			30.00%
Convertible debt, stock price trigger			$ 32.23
Conversion ratio			40.3323
Trading days common stock above conversion price			20
Period of consecutive trading days preceding the date on which the notice of conversion is given			30 days
Number of equity instruments upon conversion of convertible debt			539,000
Effective Interest Rate			11.50%
Interest Expense			710,000	633,000	577,000
Interest Paid			551,000	551,000	560,000
Letters of Credit
Debt Instrument [Line Items]
Letters of credit outstanding			7,063,000	6,422,000
Revolving Credit Facility | Line of Credit
Debt Instrument [Line Items]
Borrowing capacity						100,000,000		250,000,000
Debt issuance cost	351,000
Commitment fee percentage			0.30%
Leverage ratio			1.59	2.30
Interest coverage ratio			7.02	7.51
Remaining borrowing capacity			35,303,000
Weighted average interest rate			2.25%	2.39%
Revolving Credit Facility | Line of Credit | Credit Agreement
Debt Instrument [Line Items]
Maximum leverage ratio			3.5
Interest coverage ratio, minimum						3.5
Leverage and interest coverage ratio, EBIDTA allowed to be added back related to restructuring charges						20,000,000
Leverage and interest coverage ratio, incremental EBITDA allowed to be added back related to restructuring charges						5,000,000
Leverage and interest coverage ratio, EBITDA allowed to be added back related to warranty expense accrued						10,000,000
Maximum allowance for capital expenditures permitted						25,000,000
North America/HME | Revolving Credit Facility | Line of Credit
Debt Instrument [Line Items]
Write off of deferred debt issuance cost	$ 1,070,000
Adjusted LIBOR | Revolving Credit Facility | Line of Credit
Debt Instrument [Line Items]
Basis spread on variable rate			2.00%
Base Rate | Revolving Credit Facility | Line of Credit
Debt Instrument [Line Items]
Basis spread on variable rate			1.00%
Base Rate | Revolving Credit Facility | Line of Credit | Credit Agreement
Debt Instrument [Line Items]
Basis spread on variable rate			0.25%