Financial Instruments and Fair Value Measurements (Details Textual)		3 Months Ended	12 Months Ended
	Jan. 29, 2016 USD ($) payment	Mar. 31, 2017 USD ($) payment	Dec. 31, 2016 USD ($)	Apr. 22, 2016 USD ($)
Land [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Tangible Asset Impairment Charges		$ 0	$ 0
Initial Montana Acquisition [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Business Combination, Contingent Consideration Maximum	$ 2,000,000
Business Combination, Contingent Consideration Arrangements, Number of Periodic Payment | payment	4	4
Fair value of intangible assets acquired	$ 14,400,000
Initial Montana Acquisition [Member] | Fair Value, Inputs, Level 3 [Member] | Non-recurring Basis [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Fair value of intangible assets acquired	$ 14,400,000
Initial Montana Acquisition [Member] | Other Accrued Expenses and Other Long-term Obligations [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Business Combination, Contingent Consideration, Liability		$ 2,000,000
Second Montana Acquisition [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Fair value of intangible assets acquired				$ 11,400,000
Second Montana Acquisition [Member] | Fair Value, Inputs, Level 3 [Member] | Non-recurring Basis [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Fair value of intangible assets acquired				$ 11,400,000