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Restructuring and Acquisition Charges
 12 Months Ended
Dec. 31, 2016
Restructuring and Related Activities [Abstract]  
Restructuring and Acquisition Charges
14.
RESTRUCTURING AND ACQUISITION CHARGES
For the years ended December 31, 2016, 2015 and 2014, we recognized Restructuring and acquisition charges of $68.5 million, $34.1 million and $42.5 million, respectively.
For the year-ended December 31, 2016, we recognized a $6.5 million charge related to the write-off of an indefinite-lived intangible asset and $13.5 million related to net increases to earn-out liabilities that arose from prior period acquisition activity. In 2015, $12.8 million related to the write-off of an indemnification asset that arose from prior period acquisition activity and $2.4 million related to net increases to earn-out liabilities that arose from prior period acquisition activity. In 2014, $34.5 million related to the write-off of an indemnification asset that arose from prior period acquisition activity, offset by $3.9 million of net decreases to earn-out liabilities that arose from prior period acquisition activity.
In all periods, the remaining charges primarily consisted of (1) severance and employment-related charges, including those related to external service providers, incurred in conjunction with a structural business shift, which can be represented by a notable change in headcount, change in leadership, or transformation of business processes, (2) lease exit charges, and (3) other acquisition and integration-related charges. The following table shows the restructuring and acquisition accrual activity and related payments, which are exclusive of the adjustments individually noted above.
($ in millions)
Severance & Employment-Related
Retention
Bonuses
Lease
Exit
Other
Acquisition
Costs
Total
December 31, 2013
$
3.8

0.4

5.9

0.4

10.5

Accruals
5.2

—

3.2

3.5

11.9

Payments made
(6.0
)
(0.4
)
(4.9
)
(3.5
)
(14.8
)
December 31, 2014
3.0

—

4.2

0.4

7.6

Accruals
1.7

—

1.6

15.6

18.9

Payments made
(2.0
)
—

(0.1
)
(15.8
)
(17.9
)
December 31, 2015
2.7

—

5.7

0.2

8.6

Accruals
28.0

—

0.3

20.2

48.5

Payments made
(11.0
)
—

(0.5
)
(14.6
)
(26.1
)
December 31, 2016
$
19.7

—

5.5

5.8

31.0


We expect the majority of accrued severance and other accrued acquisition costs as of December 31, 2016 will be paid during the first half of 2017. Lease exit payments depend on the terms of various leases, which extend as far out as 2020.