Registration of securities issued in business combination transactions

Acquisitions of ITS - Narrative (Detail)

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Acquisitions of ITS - Narrative (Detail) (USD $)
 3 Months Ended 12 Months Ended 0 Months Ended 3 Months Ended 9 Months Ended 12 Months Ended
Mar. 31, 2014
Dec. 31, 2013
Sep. 30, 2013
Jun. 30, 2013
Mar. 31, 2013
Dec. 31, 2012
Sep. 30, 2012
Jun. 30, 2012
Mar. 31, 2012
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2013
Term Loan [Member]
Dec. 31, 2012
Term Loan [Member]
Jul. 30, 2013
7.50% Senior Notes, due August 2020 (Issued July 30, 2013) [Member]
Dec. 31, 2013
Term Note Due April 2018 [Member]
Jul. 30, 2013
Term Note Due April 2018 [Member]
Jul. 30, 2013
ITS [Member]
Apr. 22, 2013
ITS [Member]
Apr. 18, 2013
ITS [Member]
Mar. 31, 2014
ITS [Member]
Dec. 31, 2013
ITS [Member]
Dec. 31, 2013
ITS [Member]
Dec. 31, 2013
ITS [Member]
Term Loan [Member]
Sep. 30, 2013
ITS [Member]
7.50% Senior Notes, due August 2020 (Issued July 30, 2013) [Member]
Jul. 30, 2013
ITS [Member]
7.50% Senior Notes, due August 2020 (Issued July 30, 2013) [Member]
Mar. 31, 2014
ITS [Member]
Term Note Due April 2018 [Member]
Jul. 30, 2013
ITS [Member]
Term Note Due April 2018 [Member]
Mar. 31, 2014
ITS [Member]
Accounts Receivable [Member]
Dec. 31, 2013
ITS [Member]
Accounts Receivable [Member]
Business Acquisition [Line Items]                                                            
Cash paid to, or on behalf of, ITS and its equity holders                                     $ 101,000,000                      
Cash paid for acquisition                                     24,000,000                      
Business Acquisition, Escrow Funds Released                                         7,000,000 5,000,000 5,000,000              
Fair value of contingent consideration deposited in escrow for assets not acquired                                     5,000,000 [1]                      
Assets, Fair Value Disclosure                                                         0 0
Acquisition related costs                                             22,500,000              
Debt issuance costs 7,300,000                                       5,400,000     5,400,000            
Long-term Debt 631,375,000 653,781,000       479,205,000       653,781,000 479,205,000   0 50,000,000                   125,000,000     125,000,000      
Proceeds from issuance of term note                                   225,000,000   225,000,000                    
Debt instrument fixed interest rate                             7.50%                     7.50% 7.50%      
Deferred acquisition costs                               5,100,000 5,300,000               5,200,000   5,100,000 5,500,000    
Revenues 229,225,000 243,321,000 237,762,000 225,954,000 167,135,000 157,171,000 165,200,000 178,895,000 176,495,000 874,172,000 677,761,000 686,234,000                 27,800,000 88,000,000                
Net income $ (12,392,000)       $ 572,000         $ 27,179,000 $ 37,098,000 $ (50,645,000)                 $ (2,000,000) $ 10,000,000                
[1] Based on the terms of the Acquisition Agreement, $5.0 million of the $24.0 million in escrow to be paid to the seller is contingent upon certain future liabilities that could become due by ITS in certain jurisdictions. Any payments in relation to these liabilities will be deducted from the $5.0 million escrow amount and the net balance of the escrow will be paid to the seller. We estimate that the entire $5.0 million in escrow will be paid to the seller, and therefore, the estimated fair value of the consideration in escrow related to these liabilities is $5.0 million. We do not expect to receive any amount back from escrow, and therefore did not record a receivable from the escrow. Any changes to the fair value of the contingent consideration in the future of less than $5.0 million will result in recording a receivable from escrow. The receivable will be recorded at fair value. As of March 31, 2014, the fair value of the receivable was $0.0 million.