Shareholders' Equity and Stock Options (Tables)

12 Months Ended

Dec. 31, 2014

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Shares of capital stock reserved for possible future issuance

Shares of capital stock reserved for possible future issuance are as follows:

	December 31, 2014	December 31, 2013
Stock acquisition program	120,883	120,883
Stock options and restricted stock	862,040	1,328,414
Shares available for issuance	1,176,882	479,307
Rogers Employee Savings and Investment Plan	169,044	169,044
Rogers Corporation Global Stock Ownership Plan for Employees	166,152	181,617
Deferred compensation to be paid in stock	13,248	14,558
Total	2,508,249	2,293,823

Weighted average assumptions used to calculate fair value of options granted

	December 31, 2012
Options granted	46,950
Weighted average exercise price	$	41.27
Weighted-average grant date fair value	19.08
Assumptions:
Expected volatility	47.70		%
Expected term (in years)	5.9
Risk-free interest rate	1.43		%
Expected dividend yield	—

Activity under our stock option plans

A summary of the activity under our stock option plans for the fiscal years ended 2014, 2013 and 2012, is presented below:

	2014				2013				2012
	Options Outstanding		Weighted- Average Exercise Price Per Share		Options Outstanding		Weighted- Average Exercise Price Per Share		Options Outstanding		Weighted- Average Exercise Price Per Share
Outstanding at beginning of year	893,139		$	43.23	1,765,947		$	40.58	2,401,809		$	37.54
Options granted	—		—		—		—		46,950		41.27
Options exercised	(476,793	)	44.60		(847,340	)	37.82		(614,263	)	42.97
Options cancelled	(22,999	)	57.07		(25,468	)	39.04		(68,549	)	43.57
Outstanding at year-end	393,347		40.72		893,139		43.23		1,765,947		40.58
Options exercisable at year-end	364,770				721,645				1,274,340

A summary of the activity under our stock option plans as of December 31, 2014 and changes during the year then ended, is presented below:

	Options Outstanding		Weighted- Average Exercise Price Per Share		Weighted-Average Remaining Contractual Life in Years	Aggregate Intrinsic Value
Options outstanding at December 31, 2013	893,139		$	43.23	3.9	16,403,816
Options granted	—		—
Options exercised	(476,793	)	44.60
Options cancelled	(22,999	)	57.07
Options outstanding at December 31, 2014	393,347		40.72		3.8	16,019,130
Options exercisable at December 31, 2014	364,770		40.13		3.4	15,069,704
Options vested at December 31, 2014 or expected to vest*	392,490		40.70		3.8	15,990,648

* In addition to the vested options, we expect a portion of the unvested options to vest at some point in the future. Options expected to vest are calculated by applying an estimated forfeiture rate to the unvested options.

Schedule of weighted-average assumptions used

Weighted-average assumptions used to determine benefit obligations at December 31:

	Pension Benefits				Retirement Health and Life Insurance Benefits
	2014		2013		2014		2013
Discount rate	4.00	%	4.75	%	3.00	%	3.25	%
Expected long-term rate of return on plan assets	6.50	%	7.50	%	—		—

Weighted-average assumptions used to determine net benefit cost for the years ended:

	Pension Benefits				Retirement Health and Life Insurance Benefits
	2014		2013		2014		2013
Discount rate	4.75	%	4.00	%	3.25	%	2.50	%
Expected long-term rate of return on plan assets	7.50	%	7.50	%	—		—
Rate of compensation increase	4.00	%	4.00	%	—		—

Performance Shares [Member]

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Schedule of weighted-average assumptions used

Below are the assumptions used in the Monte Carlo calculation:

	2014		2013
Expected volatility	33.7	%	37.1	%
Expected term (in years)	3		3
Risk-free interest rate	0.67	%	0.40	%
Expected dividend yield	—		—

Schedule of of restricted stock and restricted stock activity

A summary of activity under the performance-based restricted stock plans for the fiscal years ended 2014, 2013 and 2012 is presented below:

	2014				2013				2012
	Awards Outstanding		Weighted- Average Grant Date Fair Value		Awards Outstanding		Weighted- Average Grant Date Fair Value		Awards Outstanding		Weighted- Average Grant Date Fair Value
Non-vested awards outstanding at beginning of year	71,175		$	47.49	73,458		$	38.01	101,730		$	31.19
Awards granted	51,850		58.61		47,625		47.10		22,120		41.27
Stock issued	(14,383	)	47.89		(33,538	)	27.43		(43,750	)	23.86
Awards forfeited or expired	(16,205	)	52.71		(16,370	)	44.90		(6,642	)	37.67
Non-vested awards outstanding at end of year	92,437		$	52.75	71,175		$	47.49	73,458		$	38.01

Time Based Restricted Stock [Member]

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Schedule of of restricted stock and restricted stock activity

	2014				2013				2012
	Awards Outstanding		Weighted- Average Grant Date Fair Value		Awards Outstanding		Weighted- Average Grant Date Fair Value		Awards Outstanding		Weighted-Average Grant Date Fair Value
Non-vested awards outstanding at beginning of year	231,026		$	48.54	115,139		$	43.27	86,707		$	44.55
Awards granted	93,780		61.70		156,665		51.78		51,790		40.99
Stock issued	(62,378	)	47.19		(12,436	)	43.97		(16,620	)	41.64
Awards forfeited or expired	(24,042	)	51.19		(28,342	)	47.07		(6,738	)	46.21
Non-vested awards outstanding at end of year	238,386		$	53.80	231,026		$	48.54	115,139		$	43.27

Deferred Stock Units [Member]

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Schedule of of restricted stock and restricted stock activity

	2014				2013				2012
	Awards Outstanding		Weighted- Average Grant Date Fair Value		Awards Outstanding		Weighted- Average Grant Date Fair Value		Awards Outstanding		Weighted-Average Grant Date Fair Value
Non-vested awards outstanding at beginning of year	31,550		$	26.77	30,150		$	26.13	27,350		$	28.80
Awards granted	14,700		58.45		16,800		41.67		17,600		38.64
Stock issued	(16,100	)	60.08		(15,400	)	41.77		(14,800	)	45.95
Non-vested awards outstanding at end of year	30,150		$	24.43	31,550		$	26.77	30,150		$	26.13