Fair Value Measurements (Details 2) (USD $)
In Thousands, unless otherwise specified |
12 Months Ended | 0 Months Ended | 1 Months Ended | 0 Months Ended | 3 Months Ended | 12 Months Ended | ||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Dec. 31, 2013
|
Dec. 31, 2012
|
Dec. 31, 2011
|
Mar. 12, 2012
Sprint sellers
|
Sep. 28, 2012
Saxon Group
|
Nov. 17, 2012
Q3C Contracting, Inc
|
Aug. 31, 2013
Q3C Contracting, Inc
|
Mar. 11, 2013
FSSI acquisition
|
Jun. 30, 2013
FSSI acquisition
|
Dec. 31, 2013
Contingent Consideration Liability
item
|
Dec. 31, 2012
Contingent Consideration Liability
|
Dec. 31, 2013
Contingent Consideration Liability
Sprint sellers
|
Dec. 31, 2012
Contingent Consideration Liability
Sprint sellers
|
Dec. 31, 2012
Contingent Consideration Liability
Saxon Group
|
Dec. 31, 2012
Contingent Consideration Liability
Q3C Contracting, Inc
|
Dec. 31, 2013
Contingent Consideration Liability
FSSI acquisition
|
Dec. 31, 2013
Contingent Consideration Liability
Rockford sellers
|
Dec. 31, 2012
Contingent Consideration Liability
Rockford sellers
|
|
Rollforward of contingent consideration liability level three fair value measurements | ||||||||||||||||||
Balance at the beginning of the period | $ 23,431 | $ 12,718 | ||||||||||||||||
Additions to contingent consideration liability | 6,200 | 1,950 | 7,448 | 702 | ||||||||||||||
Change in fair value of contingent consideration liability | (14,900) | (1,435) | 2,927 | 2,500 | 2,015 | |||||||||||||
Payments | (21,197) | (550) | (48,116) | (598) | (1,025) | (650) | (4,000) | (6,900) | (6,900) | |||||||||
Reduction due to non-attainment of performance targets | (6,500) | |||||||||||||||||
Balance at the end of the period | $ 9,233 | $ 23,431 | ||||||||||||||||
Additional information | ||||||||||||||||||
Number of unobservable inputs | 2 | |||||||||||||||||
Minimum probability of acquired entity meeting contractual operating performance target (as a percent) | 33.00% | |||||||||||||||||
Maximum probability of acquired entity meeting contractual operating performance target (as a percent) | 100.00% |