Retirement Benefit Plans (Tables)

12 Months Ended

Dec. 31, 2015

Retirement Benefit Plans [Abstract]

Defined Contribution Plan Matching Obligations

Matching obligations, in connection with the plans which are funded in cash and typically contributed to the plans in March of the following year, are as follows (in thousands):

	U.S. Defined Contribution
Year ended December 31,
2015	$	8,445
2014		8,267
2013		8,115

Components of Net Periodic Benefit Cost for Defined Benefit Plan

The components of net periodic benefit cost for our defined benefit plan include the following (in thousands):

	December 31,
Defined benefit retirement plan:	2015		2014		2013
Service cost	$	—	$	164	$	180
Interest cost		218		277		235
Amortization of prior service cost		—		—		28
Actuarial net loss		735		388		690
Settlement loss		1,509		—		—
Net periodic benefit cost	$	2,462	$	829	$	1,133

Defined Benefit Pension Plan, Projected Benefit Obligation ("PBO"), Accumulated Benefit Obligation ("ABO") and Fair Value of Plan's Assets

For the defined benefit pension plan, the projected benefit obligation (“PBO”), accumulated benefit obligation (“ABO”) and fair value of the plan’s assets are as follows (in thousands):

	December 31,
	2015		2014
Projected benefit obligation	$	—	$	6,538
Accumulated benefit obligation		—		6,538
Fair value of plan assets		—		—

SERP Defined Benefit Plan [Member]

Defined Benefit Plan Disclosure [Line Items]

Funded (Unfunded) Status

The benefit obligation, funded status, and amounts recognized in the consolidated financial statements for the SERP, as of and for the years ended December 31, 2015 and 2014, were (in thousands):

	Defined Benefit Retirement Plan
	2015			2014
Change in benefit obligation:
Benefit obligation at beginning of year	$	6,538		$	5,661
Service cost		—			164
Interest cost		218			277
Actuarial loss		854			436
Benefits paid		(7,610	)		—
Benefit obligation at end of year	$	—		$	6,538
Unfunded status of the plan	$	—		$	(6,538	)
Amounts recognized in the balance sheet:
Accrued postretirement benefit liabilities	$	—		$	6,538
Accumulated other comprehensive loss (pre-tax) related to:
Unrecognized net actuarial losses		—			1,389
Unrecognized prior service cost		—			—

Amounts Recognized in Balance Sheet

Actuarial assumptions used to determine costs and benefit obligations related to our defined benefit plan are as follows:

	Settlement Date			December 31,
	2015			2014			2013
Discount rates		2.88	%		4.00	%		4.90	%
Salary increase		N/A			N/A			4.00	%

Actuarial Assumptions Used to Determine Costs and Benefit Obligations

Actuarial assumptions used to determine costs and benefit obligations related to our defined benefit plan are as follows:

	Settlement Date			December 31,
	2015			2014			2013
Discount rates		2.88	%		4.00	%		4.90	%
Salary increase		N/A			N/A			4.00	%