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Fair Value Measurement (Detail) - (Table) (USD $)	3 Months Ended		12 Months Ended
Fair Value Measurement (Detail) - (Table) (USD $)	Mar. 31, 2015	Mar. 31, 2014	Dec. 31, 2014	Aug. 13, 2014	Jun. 25, 2007
Interest Receivable	$ 18,000us-gaap_InterestReceivable		$ 156,000us-gaap_InterestReceivable
Debt Instrument, Periodic Payment			893,000us-gaap_DebtInstrumentPeriodicPayment
Unrealized Gain (Loss) on Securities	356,000		11,000
Business Acquisition, Contingent Consideration, Actual Cash Payment	(9,469,000)	0
Contingent Liability	427,000	0
Assets:
Available-for-sale Securities, Current	27,337,000	30,714,000	31,198,000
Notes Receivable, Related Parties, Noncurrent	3,244,000	3,581,000	3,328,000		3,000,000
Available-for-sale Securities, Noncurrent	90,907,000	91,945,000	90,446,000
Notes, Loans and Financing Receivable, Net, Noncurrent	1,727,000	2,461,000	1,878,000
Contingent payment liability	27,605,000	25,156,000	27,178,000	4,616,000
Liabilities:
Foreign Currency Contract, Asset, Fair Value Disclosure	2,932,000
Available-for-sale Securities, Gross Unrealized Loss	135,000		589,000
Debt Instrument, Decrease, Forgiveness	102,000		409,000
Foreign Currency Exchange Rate, Translation	151,000		400,000
Business Combination, Contingent Consideration Arrangements, Change in Range of Outcomes, Contingent Consideration, Liability, Value, Low			2,139,000
Fair Value [Member]
Assets:
Cash Equivalents	2,286,000		2,280,000
Current marketable securities – available for sale			31,198,000
Long-term marketable securities – available for sale			90,446,000
Total assets	125,501,000		129,130,000
Contingent payment liability	39,060,000		38,633,000
Liabilities:
Total liabilities	41,992,000		40,967,000
Fair Value [Member] \| Note receivable – related party [Member]
Assets:
Notes Receivable, Fair Value Disclosure	3,244,000		3,328,000
Fair Value [Member] \| Forward contracts [Member]
Liabilities:
Foreign Currency Contracts, Liability, Fair Value Disclosure	2,932,000		2,334,000
Fair Value [Member] \| Note receivable – Seller of SM Canada [Member]
Assets:
Notes Receivable, Fair Value Disclosure			1,878,000
Fair Value, Inputs, Level 1 [Member]
Assets:
Cash Equivalents	2,286,000		2,280,000
Current marketable securities – available for sale	27,337,000		31,198,000
Long-term marketable securities – available for sale	90,907,000		90,446,000
Total assets	120,530,000		123,924,000
Contingent payment liability	0		0
Liabilities:
Total liabilities	0		0
Fair Value, Inputs, Level 1 [Member] \| Note receivable – related party [Member]
Assets:
Notes Receivable, Fair Value Disclosure	0		0
Fair Value, Inputs, Level 1 [Member] \| Forward contracts [Member]
Liabilities:
Foreign Currency Contracts, Liability, Fair Value Disclosure	0		0
Fair Value, Inputs, Level 1 [Member] \| Note receivable – Seller of SM Canada [Member]
Assets:
Notes Receivable, Fair Value Disclosure	0		0
Fair Value, Inputs, Level 2 [Member]
Assets:
Cash Equivalents	0		0
Current marketable securities – available for sale	0		0
Long-term marketable securities – available for sale	0		0
Total assets	0		0
Contingent payment liability	0		0
Liabilities:
Total liabilities	2,932,000		2,334,000
Fair Value, Inputs, Level 2 [Member] \| Note receivable – related party [Member]
Assets:
Notes Receivable, Fair Value Disclosure	0		0
Fair Value, Inputs, Level 2 [Member] \| Forward contracts [Member]
Liabilities:
Foreign Currency Contracts, Liability, Fair Value Disclosure	2,932,000		2,334,000
Fair Value, Inputs, Level 2 [Member] \| Note receivable – Seller of SM Canada [Member]
Assets:
Notes Receivable, Fair Value Disclosure	0		0
Fair Value, Inputs, Level 3 [Member]
Assets:
Cash Equivalents	0		0
Current marketable securities – available for sale	0		0
Long-term marketable securities – available for sale	0		0
Total assets	4,971,000		5,206,000
Contingent payment liability	39,060,000		38,633,000
Liabilities:
Total liabilities	39,060,000		38,633,000
Fair Value, Inputs, Level 3 [Member] \| Note receivable – related party [Member]
Assets:
Notes Receivable, Fair Value Disclosure	3,244,000		3,328,000
Fair Value, Inputs, Level 3 [Member] \| Forward contracts [Member]
Liabilities:
Foreign Currency Contracts, Liability, Fair Value Disclosure	0		0
Fair Value, Inputs, Level 3 [Member] \| Note receivable – Seller of SM Canada [Member]
Assets:
Notes Receivable, Fair Value Disclosure	1,727,000		1,878,000
Available-for-sale Securities, Current [Member]
Unrealized Gain (Loss) on Securities	4,000		1,000
Liabilities:
Available-for-sale Securities, Gross Unrealized Loss	74,000		145,000
Sm canada [Member]
Liabilities:
business combinations contingent liability payment			3,315,000
Cejon Acquisition [Member]
Liabilities:
business combinations contingent liability payment			5,160,000
Dolce Vita [Member]
Assets:
Contingent payment liability	5,000,000
Liabilities:
business combinations contingent liability payment			4,616,000
SM Mexico [Member]
Assets:
Contingent payment liability	10,000
Liabilities:
business combinations contingent liability payment			$ 9,836,000