Subfacility for swingline loans maximum borrowing percentage of aggregate revolver commitments.

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Line of Credit Facility, Additional Capacity

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Line of Credit Facility, Periodic Payment, Percentage of Principal, Remaining Installments

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Number of Financial Covenants

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Percentage points added to the reference rate to compute the variable rate on the debt instrument.

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Face (par) amount of debt instrument at time of issuance.

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Percentage of principal amount of debt redeemed.

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Period of time between issuance and maturity of debt instrument, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Amount, after accumulated amortization, of debt discount.

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Amount, after accumulated amortization, of debt issuance costs. Includes, but is not limited to, legal, accounting, underwriting, printing, and registration costs.

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Difference between the fair value of payments made and the carrying amount of debt which is extinguished prior to maturity.

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The total amount of the contingent obligation under letters of credit outstanding as of the reporting date.

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The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

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Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

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Amount of borrowing capacity currently available under the credit facility (current borrowing capacity less the amount of borrowings outstanding).

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The fee, expressed as a percentage of the line of credit facility, for available but unused credit capacity under the credit facility.

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The cash inflow from additional borrowings, net of cash paid to third parties in connection with debt origination.

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Amount of cash inflow from contractual arrangement with the lender, including but not limited to, letter of credit, standby letter of credit and revolving credit arrangements.

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Indebtedness divided by net capital.

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Debt - Narrative (Detail)				3 Months Ended	12 Months Ended
Debt - Narrative (Detail)	Jun. 22, 2016 USD ($)	Jul. 22, 2015	Jun. 30, 2014 USD ($)	Jun. 30, 2016 USD ($)	Dec. 31, 2016 USD ($) financial_covenant	Dec. 31, 2015 USD ($)	Dec. 31, 2014 USD ($)
Debt Instrument [Line Items]
Prepayment penalty	$ 600,000
Loss on early extinguishment of debt					$ 1,568,000	$ 0	$ 0
First Lien Loan Agreement
Debt Instrument [Line Items]
Credit facility maximum borrowing capacity						$ 71,600,000
Quarterly commitment fee on the average daily unused portion (percent)						0.375%
Available borrowing capacity, gross						$ 40,100,000
Letters of credit outstanding						23,500,000
Draw under revolving credit facility						$ 8,000,000
Second Lien Term Loan
Debt Instrument [Line Items]
Interest rate increase (decrease) (percent)					2.00%
Convertible Senior Notes
Debt Instrument [Line Items]
Face amount			$ 25,000,000.0
Proceeds from debt, net			24,100,000
Debt issuance costs, net			$ 300,000
LIBOR \| First Lien Loan Agreement
Debt Instrument [Line Items]
Interest margin						1.50%
Base Rate \| First Lien Loan Agreement
Debt Instrument [Line Items]
Interest margin						0.50%
Credit Agreement
Debt Instrument [Line Items]
Interest rate increase (decrease) (percent)					2.00%
Quarterly commitment fee on the average daily unused portion (percent)					0.30%
Number of financial covenants \| financial_covenant					2
Credit Agreement \| Senior Debt
Debt Instrument [Line Items]
Credit facility maximum borrowing capacity	$ 40,000,000.0
Percentage of principal payment for first four installments	1.25%
Percentage of principal payment for next eight installments	1.875%
Percentage of principal payment for remaining installments	2.50%
Credit Agreement \| Minimum
Debt Instrument [Line Items]
Consolidated Fixed Charge Coverage Ratio					1.50
Credit Agreement \| LIBOR \| Senior Debt
Debt Instrument [Line Items]
Interest margin					2.00%
Second Lien Term Loan
Debt Instrument [Line Items]
Loss on early extinguishment of debt				$ 1,600,000
Second Lien Term Loan \| Subordinated Debt
Debt Instrument [Line Items]
Loss on early extinguishment of debt				$ 1,600,000
Second Lien Term Loan \| Junior subordinated debt
Debt Instrument [Line Items]
Line of credit facility, term			5 years
Interest margin			6.50%
Face amount			$ 30,000,000.0
Unamortized discount			1,100,000
Proceeds from debt, net			28,900,000
Debt issuance costs, net			$ 400,000
Basis spread, floor (percent)			1.00%
Second Lien Term Loan \| LIBOR \| Junior subordinated debt
Debt Instrument [Line Items]
Interest margin					4.75%
Variable rate, floor (percent)		1.00%			1.00%
Revolving Credit Facility \| Credit Agreement
Debt Instrument [Line Items]
Credit facility maximum borrowing capacity	$ 100,000,000.0
Line of credit, subfacility for standby letters of credit	35,000,000.0
Sub facility for swingline loans	15,000,000.0
Additional capacity	50,000,000.0
Line of credit outstanding					$ 77,800,000
Letters of credit outstanding					$ 22,200,000
Revolving Credit Facility \| Credit Agreement \| LIBOR
Debt Instrument [Line Items]
Interest margin					2.00%
Revolving Credit Facility \| First Lien Loan Agreement
Debt Instrument [Line Items]
Credit facility maximum borrowing capacity						$ 85,000,000.0
Subfacility loans percentage up to aggregate revolver commitments (percent)						10.00%
Line of credit, subfacility for standby letters of credit						$ 35,000,000.0
Letters of credit rolled and issued under new facility	$ 23,100,000
Revolving Credit Facility \| Second Lien Term Loan \| Subordinated Debt
Debt Instrument [Line Items]
Credit facility maximum borrowing capacity						$ 30,000,000.0
Line of credit facility, term						5 years
Revolving Credit Facility \| Second Lien Term Loan \| Period July 1, 2015 through June 30, 2016 \| Subordinated Debt
Debt Instrument [Line Items]
Percentage of principal amount redeemed						103.00%
Revolving Credit Facility \| Second Lien Term Loan \| Period July 1, 2016 through June 30, 2017 \| Subordinated Debt
Debt Instrument [Line Items]
Percentage of principal amount redeemed						102.00%
Revolving Credit Facility \| Second Lien Term Loan \| After June 30, 2017 \| Subordinated Debt
Debt Instrument [Line Items]
Percentage of principal amount redeemed						100.00%
Fiscal Quarters Ending September 30, 2016 through June 30, 2017 \| Credit Agreement \| Maximum
Debt Instrument [Line Items]
Consolidated Net Leverage Ratio					3.50
Fiscal Quarters Ending September 30, 2017 through June 30, 2018 \| Credit Agreement \| Maximum
Debt Instrument [Line Items]
Consolidated Net Leverage Ratio					3.25
Each Fiscal Quarter Ending Thereafter \| Credit Agreement \| Maximum
Debt Instrument [Line Items]
Consolidated Net Leverage Ratio					3.00