Debt and Capital Lease Obligations - Master Lease Agreements - Additional Information (Details) - Lease Agreements	6 Months Ended
Jun. 30, 2015
Minimum
Line Of Credit Facility [Line Items]
Loans and lease agreement term	3 years
Maximum
Line Of Credit Facility [Line Items]
Loans and lease agreement term	5 years

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.

No definition available.

Name:	us-gaap_LineOfCreditFacilityLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration