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Employee Benefit Plans - Narrative (Details) | 3 Months Ended | 6 Months Ended | 12 Months Ended |  |
--- | --- | --- | --- | --- | ---
Dec. 31, 2015 USD ($) plan | Dec. 31, 2014 USD ($) | Dec. 31, 2015 plan | Jun. 30, 2015 USD ($) | Jun. 30, 2012 USD ($) quarter | Jan. 05, 2015 USD ($) | Nov. 18, 2014 USD ($)
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |  |  |  |  |  |  |
401(k) Plan employer matching contribution | $ 800,000 | $ 700,000 |  |  |  |  |
Number of non-pension multiemployer plans that the Company participates in | 8 |  | 8 |  |  |  |
Minimum [Member] |  |  |  |  |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |  |  |  |  |  |  |
Investment horizon period |  |  | 20 years |  |  |  |
Maximum [Member] |  |  |  |  |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |  |  |  |  |  |  |
Investment horizon period |  |  | 30 years |  |  |  |
Labor Management Pension Fund [Member] |  |  |  |  |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |  |  |  |  |  |  |
Withdrawal obligation |  |  |  |  | $ 4,300,000 | $ 4,900,000 | $ 4,400,000
Quarterly installment payments on estimated withdrawal liability |  |  |  | $ 91,000 | $ 100,000 |  |
Number of quarters relating to installment payments on estimated withdrawal liability | quarter |  |  |  |  | 80 |  |
Multiemployer Plans, Pension [Member] |  |  |  |  |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |  |  |  |  |  |  |
Number of non-pension multiemployer plans that the Company participates in | plan | 2 |  | 2 |  |  |  |

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- Definition Defined Benefit Plan, Assumptions Used Calculating Weighted Average Rate, Investment Horizon, Period + References No definition available. + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Definition Amount of the obligation recognized by withdrawing from a pension or postretirement benefit plan to which two or more unrelated employers contribute where assets contributed by one participating employer may be used to provide benefits to employees of other participating employers. + References No definition available. + Details
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