Property and Equipment (Details) (USD $)
In Thousands, unless otherwise specified |
12 Months Ended | |
---|---|---|
Dec. 31, 2013
|
Dec. 31, 2012
|
|
Property and equipment | ||
Gross property and equipment | $ 363,559 | $ 289,829 |
Less: accumulated depreciation and amortization | (137,047) | (104,989) |
Net property and equipment | 226,512 | 184,840 |
Minimum
|
||
Property and equipment | ||
Useful Life | 3 years | |
Maximum
|
||
Property and equipment | ||
Useful Life | 30 years | |
Land and buildings
|
||
Property and equipment | ||
Gross property and equipment | 36,883 | 29,914 |
Useful Life | 30 years | |
Leasehold improvements
|
||
Property and equipment | ||
Gross property and equipment | 7,958 | 11,974 |
Office equipment
|
||
Property and equipment | ||
Gross property and equipment | 3,171 | 2,092 |
Office equipment | Minimum
|
||
Property and equipment | ||
Useful Life | 3 years | |
Office equipment | Maximum
|
||
Property and equipment | ||
Useful Life | 5 years | |
Construction equipment
|
||
Property and equipment | ||
Gross property and equipment | 247,997 | 197,200 |
Construction equipment | Minimum
|
||
Property and equipment | ||
Useful Life | 3 years | |
Construction equipment | Maximum
|
||
Property and equipment | ||
Useful Life | 7 years | |
Transportation equipment
|
||
Property and equipment | ||
Gross property and equipment | $ 67,550 | $ 48,649 |
Transportation equipment | Minimum
|
||
Property and equipment | ||
Useful Life | 3 years | |
Transportation equipment | Maximum
|
||
Property and equipment | ||
Useful Life | 18 years |