Long-Term Debt - Schedule of Long-Term Debt (Parenthetical) (Detail) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
Debt Instrument [Line Items]
Earliest redemption date	Aug. 01, 2016
Loss on extinguishment of debt		$ (1,296,000)
First Priority Secured Notes [Member]
Debt Instrument [Line Items]
Carrying value of the assets	607,000,000
Second Priority Secured Notes [Member]
Debt Instrument [Line Items]
Carrying value of the assets	136,000,000
7.75% Senior Secured Notes Due 2019 [Member]
Debt Instrument [Line Items]
Debt instrument, interest rate	7.75%	7.75%
Maturity year	2019	2019
Maturity date	Aug. 01, 2019
Offering date	Aug. 07, 2013
Aggregate principal amount of notes sold	425,000,000
Debt instrument, frequency of interest payment	Interest is to be paid semiannually on February 1st and August 1st
Number of unsecured guarantors	2
Secured Promissory Note [Member]
Debt Instrument [Line Items]
Secured Promissory Note, interest rate	3.23%	3.23%
Maturity date	Feb. 01, 2016
Proceeds of the Secured Promissory Note	35,000,000
Purchase price of business acquisition	50,000,000
Secured Promissory Notes, interest rate description	Principal and interest are payable monthly based on a five-year amortization at a defined LIBOR rate plus 300 basis points
Final balloon payment	15,300,000
Other [Member]
Debt Instrument [Line Items]
Weighted-average interest rate of other debt	4.22%	4.22%
Senior Secured Notes [Member]
Debt Instrument [Line Items]
Change in control purchase price	101.00%
Secured Term Loan [Member]
Debt Instrument [Line Items]
Repayment of outstanding borrowings	67,200,000
Loss on extinguishment of debt	1,300,000
Amended Working Capital Revolver Loan [Member]
Debt Instrument [Line Items]
Amended maximum amount of revolving credit facility	100,000,000
Maturity date	Apr. 13, 2018
Description of interest rate of revolving credit facility	Interest at a base rate (generally equivalent to the prime rate) plus 0.50% if borrowing availability is greater than $25.0 million, otherwise plus 0.75% or, at our option, accrues interest at LIBOR plus 1.50% if borrowing availability is greater than $25.0 million, otherwise LIBOR plus 1.75%
Line of credit facility, interest rate	3.75%
Letters of credit maximum capacity	15,000,000
Amount available for borrowing	71,100,000
Fees expressed as percentage for unused letters of credit	1.00%
Fees expressed as percentage for unused revolving credit facility	0.25%
Amended working capital revolver loan requirements	A minimum fixed charge coverage ratio of not less than 1.10 to 1, if at any time the excess availability (as defined by the Amended Working Capital Revolver Loan), under the Amended Working Capital Revolver Loan, is less than or equal to $12.5 million
Amended Working Capital Revolver Loan [Member] | Covenants [Member]
Debt Instrument [Line Items]
Loan requirements description	Equal to or greater than the greater of (x) 20% of the maximum revolver commitment or (y) $20 million
Limit of distributions/dividends	500,000
Limit of treasury stock acquisition	500,000
Limit of joint ventures	35,000,000
Limit of Other Investments	50,000,000
Events of default description	Any material misstatement or misrepresentation and breaches of representations and warranties made, violations of covenants, cross-payment default to indebtedness in excess of $2.5 million, cross-acceleration to indebtedness in excess of $2.5 million, bankruptcy and insolvency events, certain unsatisfied judgments, certain liens, and certain assertions of, or actual invalidity of, certain loan documents
Minimum [Member]
Debt Instrument [Line Items]
Notice period of senior secured notes to be redeemed	Not less than 30 days
Maximum [Member]
Debt Instrument [Line Items]
Notice period of senior secured notes to be redeemed	Nor more than 60 days