Employee Benefit Plans - Additional Information (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Defined Benefit Plan Disclosure [Line Items]
Defined contribution plan expense	$ 5.8	$ 5.7	$ 4.2
Defined Benefit Pension Plans
Defined Benefit Plan Disclosure [Line Items]
Expected contribution	15.8
Expect to recognize unrecognized actuarial losses	12.8
Expect to recognize prior service credit\cost	$ 0.2
U.S. Defined Benefit Pension Plans
Defined Benefit Plan Disclosure [Line Items]
Discount rate	4.10%	3.80%
Long-term return on plan assets	7.50%	7.50%	10.00%
Weighted average discount rate used in determining the net periodic cost	3.80%	4.50%	3.60%
U.S. Defined Benefit Pension Plans | CMRT
Defined Benefit Plan Disclosure [Line Items]
Percentage of average annual rate of return			14.00%
Long-term return on plan assets			10.00%
U.S. Defined Benefit Pension Plans | CMRT | Level 1 and Level 2
Defined Benefit Plan Disclosure [Line Items]
Percentage of fair value of asset	81.00%	80.00%
Foreign Pension Plan Defined Benefit
Defined Benefit Plan Disclosure [Line Items]
Discount rate	2.60%	2.50%
Long-term return on plan assets	4.60%	5.00%	5.00%
Weighted average discount rate used in determining the net periodic cost	2.50%	3.80%	3.70%
Foreign Pension Plan Defined Benefit | Canada
Defined Benefit Plan Disclosure [Line Items]
Curtailment			$ 7.1
Defined benefit plan, special termination benefits			$ 0.2
Average basis points of long-term rate of return on investment	1.25%
Foreign Pension Plan Defined Benefit | Canada | Equity Securities
Defined Benefit Plan Disclosure [Line Items]
Percentage of plan asset allocation	38.00%
Foreign Pension Plan Defined Benefit | Canada | Fixed Income Funds
Defined Benefit Plan Disclosure [Line Items]
Percentage of plan asset allocation	55.00%
Foreign Pension Plan Defined Benefit | Canada | Other Investments
Defined Benefit Plan Disclosure [Line Items]
Percentage of plan asset allocation	7.00%
Foreign Pension Plan Defined Benefit | Norway | Level 3 Inputs
Defined Benefit Plan Disclosure [Line Items]
Percentage of plan asset allocation	11.00%
Foreign Pension Plan Defined Benefit | Norway | Equity Securities
Defined Benefit Plan Disclosure [Line Items]
Long-term return on plan assets	7.00%
Percentage of plan asset allocation	11.00%
Foreign Pension Plan Defined Benefit | Norway | Fixed Income Funds
Defined Benefit Plan Disclosure [Line Items]
Long-term return on plan assets	5.00%
Percentage of plan asset allocation	79.00%
Foreign Pension Plan Defined Benefit | Norway | Real estate
Defined Benefit Plan Disclosure [Line Items]
Long-term return on plan assets	5.00%
Percentage of plan asset allocation	7.00%
Foreign Pension Plan Defined Benefit | Norway | Money Markets
Defined Benefit Plan Disclosure [Line Items]
Long-term return on plan assets	3.00%
OPEB
Defined Benefit Plan Disclosure [Line Items]
Expected contribution	$ 1.1
Discount rate	3.60%	3.40%
Expect to recognize unrecognized actuarial losses	$ 0.2
Expect to recognize prior service credit\cost	$ 1.8
Weighted average discount rate used in determining the net periodic cost	3.40%	4.00%	3.50%