Pension and other postretirement benefits - fair values of pension plan assets (Detail) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Cash
Schedule Of Pension Plan Assets By Fair Value [Line Items]
Fair value of plan assets		$ 1,324
Money market funds
Schedule Of Pension Plan Assets By Fair Value [Line Items]
Fair value of plan assets		51
Equity Securities | Managed Volatility
Schedule Of Pension Plan Assets By Fair Value [Line Items]
Fair value of plan assets		79,964
Equity Securities | U.S. Small/Mid-Cap Equity
Schedule Of Pension Plan Assets By Fair Value [Line Items]
Fair value of plan assets		19,239
Equity Securities | World Equity (excluding United States)
Schedule Of Pension Plan Assets By Fair Value [Line Items]
Fair value of plan assets		32,294
Equity Securities | Common Equity Securities – Teleflex Incorporated
Schedule Of Pension Plan Assets By Fair Value [Line Items]
Fair value of plan assets		29,087
Equity Securities | Diversified Global
Schedule Of Pension Plan Assets By Fair Value [Line Items]
Fair value of plan assets		6,353
Fixed Income Investments | Long duration bond fund
Schedule Of Pension Plan Assets By Fair Value [Line Items]
Fair value of plan assets		94,623
Fixed Income Investments | High yield bond fund
Schedule Of Pension Plan Assets By Fair Value [Line Items]
Fair value of plan assets		12,420
Fixed Income Investments | Emerging Markets
Schedule Of Pension Plan Assets By Fair Value [Line Items]
Fair value of plan assets		9,184
Fixed Income Investments | Corporate, government and foreign bonds
Schedule Of Pension Plan Assets By Fair Value [Line Items]
Fair value of plan assets		2,024
Fixed Income Investments | Asset backed – home loans
Schedule Of Pension Plan Assets By Fair Value [Line Items]
Fair value of plan assets		454
Other Investments | Multi asset funds
Schedule Of Pension Plan Assets By Fair Value [Line Items]
Fair value of plan assets		11,114
Other Investments | Other
Schedule Of Pension Plan Assets By Fair Value [Line Items]
Fair value of plan assets		5
Quoted Prices in Active Markets for Identical Assets (Level 1) | Cash
Schedule Of Pension Plan Assets By Fair Value [Line Items]
Fair value of plan assets		1,324
Quoted Prices in Active Markets for Identical Assets (Level 1) | Money market funds
Schedule Of Pension Plan Assets By Fair Value [Line Items]
Fair value of plan assets		51
Quoted Prices in Active Markets for Identical Assets (Level 1) | Equity Securities | Managed Volatility
Schedule Of Pension Plan Assets By Fair Value [Line Items]
Fair value of plan assets		79,964
Quoted Prices in Active Markets for Identical Assets (Level 1) | Equity Securities | U.S. Small/Mid-Cap Equity
Schedule Of Pension Plan Assets By Fair Value [Line Items]
Fair value of plan assets		19,239
Quoted Prices in Active Markets for Identical Assets (Level 1) | Equity Securities | World Equity (excluding United States)
Schedule Of Pension Plan Assets By Fair Value [Line Items]
Fair value of plan assets		32,294
Quoted Prices in Active Markets for Identical Assets (Level 1) | Equity Securities | Common Equity Securities – Teleflex Incorporated
Schedule Of Pension Plan Assets By Fair Value [Line Items]
Fair value of plan assets		29,087
Quoted Prices in Active Markets for Identical Assets (Level 1) | Equity Securities | Diversified Global
Schedule Of Pension Plan Assets By Fair Value [Line Items]
Fair value of plan assets		6,353
Quoted Prices in Active Markets for Identical Assets (Level 1) | Fixed Income Investments | Long duration bond fund
Schedule Of Pension Plan Assets By Fair Value [Line Items]
Fair value of plan assets		94,623
Quoted Prices in Active Markets for Identical Assets (Level 1) | Fixed Income Investments | High yield bond fund
Schedule Of Pension Plan Assets By Fair Value [Line Items]
Fair value of plan assets		12,420
Quoted Prices in Active Markets for Identical Assets (Level 1) | Fixed Income Investments | Emerging Markets
Schedule Of Pension Plan Assets By Fair Value [Line Items]
Fair value of plan assets		9,184
Quoted Prices in Active Markets for Identical Assets (Level 1) | Fixed Income Investments | Corporate, government and foreign bonds
Schedule Of Pension Plan Assets By Fair Value [Line Items]
Fair value of plan assets		2,024
Quoted Prices in Active Markets for Identical Assets (Level 1) | Fixed Income Investments | Asset backed – home loans
Schedule Of Pension Plan Assets By Fair Value [Line Items]
Fair value of plan assets		0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Other Investments | Multi asset funds
Schedule Of Pension Plan Assets By Fair Value [Line Items]
Fair value of plan assets		6,187
Quoted Prices in Active Markets for Identical Assets (Level 1) | Other Investments | Other
Schedule Of Pension Plan Assets By Fair Value [Line Items]
Fair value of plan assets		0
Significant Observable Inputs (Level 2) | Cash
Schedule Of Pension Plan Assets By Fair Value [Line Items]
Fair value of plan assets		0
Significant Observable Inputs (Level 2) | Money market funds
Schedule Of Pension Plan Assets By Fair Value [Line Items]
Fair value of plan assets		0
Significant Observable Inputs (Level 2) | Equity Securities | Managed Volatility
Schedule Of Pension Plan Assets By Fair Value [Line Items]
Fair value of plan assets		0
Significant Observable Inputs (Level 2) | Equity Securities | U.S. Small/Mid-Cap Equity
Schedule Of Pension Plan Assets By Fair Value [Line Items]
Fair value of plan assets		0
Significant Observable Inputs (Level 2) | Equity Securities | World Equity (excluding United States)
Schedule Of Pension Plan Assets By Fair Value [Line Items]
Fair value of plan assets		0
Significant Observable Inputs (Level 2) | Equity Securities | Common Equity Securities – Teleflex Incorporated
Schedule Of Pension Plan Assets By Fair Value [Line Items]
Fair value of plan assets		0
Significant Observable Inputs (Level 2) | Equity Securities | Diversified Global
Schedule Of Pension Plan Assets By Fair Value [Line Items]
Fair value of plan assets		0
Significant Observable Inputs (Level 2) | Fixed Income Investments | Long duration bond fund
Schedule Of Pension Plan Assets By Fair Value [Line Items]
Fair value of plan assets		0
Significant Observable Inputs (Level 2) | Fixed Income Investments | High yield bond fund
Schedule Of Pension Plan Assets By Fair Value [Line Items]
Fair value of plan assets		0
Significant Observable Inputs (Level 2) | Fixed Income Investments | Emerging Markets
Schedule Of Pension Plan Assets By Fair Value [Line Items]
Fair value of plan assets		0
Significant Observable Inputs (Level 2) | Fixed Income Investments | Corporate, government and foreign bonds
Schedule Of Pension Plan Assets By Fair Value [Line Items]
Fair value of plan assets		0
Significant Observable Inputs (Level 2) | Fixed Income Investments | Asset backed – home loans
Schedule Of Pension Plan Assets By Fair Value [Line Items]
Fair value of plan assets		454
Significant Observable Inputs (Level 2) | Other Investments | Multi asset funds
Schedule Of Pension Plan Assets By Fair Value [Line Items]
Fair value of plan assets		4,927
Significant Observable Inputs (Level 2) | Other Investments | Other
Schedule Of Pension Plan Assets By Fair Value [Line Items]
Fair value of plan assets		0
Significant Unobservable Inputs (Level 3) | Cash
Schedule Of Pension Plan Assets By Fair Value [Line Items]
Fair value of plan assets		0
Significant Unobservable Inputs (Level 3) | Money market funds
Schedule Of Pension Plan Assets By Fair Value [Line Items]
Fair value of plan assets		0
Significant Unobservable Inputs (Level 3) | Equity Securities | Managed Volatility
Schedule Of Pension Plan Assets By Fair Value [Line Items]
Fair value of plan assets		0
Significant Unobservable Inputs (Level 3) | Equity Securities | U.S. Small/Mid-Cap Equity
Schedule Of Pension Plan Assets By Fair Value [Line Items]
Fair value of plan assets		0
Significant Unobservable Inputs (Level 3) | Equity Securities | World Equity (excluding United States)
Schedule Of Pension Plan Assets By Fair Value [Line Items]
Fair value of plan assets		0
Significant Unobservable Inputs (Level 3) | Equity Securities | Common Equity Securities – Teleflex Incorporated
Schedule Of Pension Plan Assets By Fair Value [Line Items]
Fair value of plan assets		0
Significant Unobservable Inputs (Level 3) | Equity Securities | Diversified Global
Schedule Of Pension Plan Assets By Fair Value [Line Items]
Fair value of plan assets		0
Significant Unobservable Inputs (Level 3) | Fixed Income Investments | Long duration bond fund
Schedule Of Pension Plan Assets By Fair Value [Line Items]
Fair value of plan assets		0
Significant Unobservable Inputs (Level 3) | Fixed Income Investments | High yield bond fund
Schedule Of Pension Plan Assets By Fair Value [Line Items]
Fair value of plan assets		0
Significant Unobservable Inputs (Level 3) | Fixed Income Investments | Emerging Markets
Schedule Of Pension Plan Assets By Fair Value [Line Items]
Fair value of plan assets		0
Significant Unobservable Inputs (Level 3) | Fixed Income Investments | Corporate, government and foreign bonds
Schedule Of Pension Plan Assets By Fair Value [Line Items]
Fair value of plan assets		0
Significant Unobservable Inputs (Level 3) | Fixed Income Investments | Asset backed – home loans
Schedule Of Pension Plan Assets By Fair Value [Line Items]
Fair value of plan assets		0
Significant Unobservable Inputs (Level 3) | Other Investments | Multi asset funds
Schedule Of Pension Plan Assets By Fair Value [Line Items]
Fair value of plan assets
Significant Unobservable Inputs (Level 3) | Other Investments | Other
Schedule Of Pension Plan Assets By Fair Value [Line Items]
Fair value of plan assets		5
Fair Value, Measurements, Recurring
Schedule Of Pension Plan Assets By Fair Value [Line Items]
Total investments at fair value	$ 328,262	321,514
Investments measured at net asset value	34,545	64,793
Fair value of plan assets	362,807	386,307
Fair Value, Measurements, Recurring | Cash
Schedule Of Pension Plan Assets By Fair Value [Line Items]
Fair value of plan assets	627
Fair Value, Measurements, Recurring | Money market funds
Schedule Of Pension Plan Assets By Fair Value [Line Items]
Fair value of plan assets	7
Fair Value, Measurements, Recurring | Equity Securities | Managed Volatility
Schedule Of Pension Plan Assets By Fair Value [Line Items]
Fair value of plan assets	71,306
Fair Value, Measurements, Recurring | Equity Securities | U.S. Small/Mid-Cap Equity
Schedule Of Pension Plan Assets By Fair Value [Line Items]
Fair value of plan assets	15,379
Fair Value, Measurements, Recurring | Equity Securities | World Equity (excluding United States)
Schedule Of Pension Plan Assets By Fair Value [Line Items]
Fair value of plan assets	24,589
Fair Value, Measurements, Recurring | Equity Securities | Common Equity Securities – Teleflex Incorporated
Schedule Of Pension Plan Assets By Fair Value [Line Items]
Fair value of plan assets	30,216
Fair Value, Measurements, Recurring | Fixed Income Investments | Intermediate duration bond fund
Schedule Of Pension Plan Assets By Fair Value [Line Items]
Fair value of plan assets	26,958	23,378
Fair Value, Measurements, Recurring | Fixed Income Investments | Long duration bond fund
Schedule Of Pension Plan Assets By Fair Value [Line Items]
Fair value of plan assets	90,661
Fair Value, Measurements, Recurring | Fixed Income Investments | High yield bond fund
Schedule Of Pension Plan Assets By Fair Value [Line Items]
Fair value of plan assets	12,162
Fair Value, Measurements, Recurring | Fixed Income Investments | Global credit fund
Schedule Of Pension Plan Assets By Fair Value [Line Items]
Fair value of plan assets	647
Fair Value, Measurements, Recurring | Fixed Income Investments | Emerging Markets
Schedule Of Pension Plan Assets By Fair Value [Line Items]
Fair value of plan assets	7,923
Fair Value, Measurements, Recurring | Fixed Income Investments | Corporate, government and foreign bonds
Schedule Of Pension Plan Assets By Fair Value [Line Items]
Fair value of plan assets	30,418
Fair Value, Measurements, Recurring | Fixed Income Investments | Asset backed – home loans
Schedule Of Pension Plan Assets By Fair Value [Line Items]
Fair value of plan assets	367
Fair Value, Measurements, Recurring | Other Investments | Multi asset funds
Schedule Of Pension Plan Assets By Fair Value [Line Items]
Fair value of plan assets	6,905
Fair Value, Measurements, Recurring | Other Investments | Contract with insurance company
Schedule Of Pension Plan Assets By Fair Value [Line Items]
Fair value of plan assets	10,092
Fair Value, Measurements, Recurring | Other Investments | Other
Schedule Of Pension Plan Assets By Fair Value [Line Items]
Fair value of plan assets	5
Fair Value, Measurements, Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1)
Schedule Of Pension Plan Assets By Fair Value [Line Items]
Fair value of plan assets	314,569	316,128
Fair Value, Measurements, Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | Cash
Schedule Of Pension Plan Assets By Fair Value [Line Items]
Fair value of plan assets	627
Fair Value, Measurements, Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | Money market funds
Schedule Of Pension Plan Assets By Fair Value [Line Items]
Fair value of plan assets	7
Fair Value, Measurements, Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | Equity Securities | Managed Volatility
Schedule Of Pension Plan Assets By Fair Value [Line Items]
Fair value of plan assets	71,306
Fair Value, Measurements, Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | Equity Securities | U.S. Small/Mid-Cap Equity
Schedule Of Pension Plan Assets By Fair Value [Line Items]
Fair value of plan assets	15,379
Fair Value, Measurements, Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | Equity Securities | World Equity (excluding United States)
Schedule Of Pension Plan Assets By Fair Value [Line Items]
Fair value of plan assets	24,589
Fair Value, Measurements, Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | Equity Securities | Common Equity Securities – Teleflex Incorporated
Schedule Of Pension Plan Assets By Fair Value [Line Items]
Fair value of plan assets	30,216
Fair Value, Measurements, Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | Fixed Income Investments | Intermediate duration bond fund
Schedule Of Pension Plan Assets By Fair Value [Line Items]
Fair value of plan assets	26,958	23,378
Fair Value, Measurements, Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | Fixed Income Investments | Long duration bond fund
Schedule Of Pension Plan Assets By Fair Value [Line Items]
Fair value of plan assets	90,661
Fair Value, Measurements, Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | Fixed Income Investments | High yield bond fund
Schedule Of Pension Plan Assets By Fair Value [Line Items]
Fair value of plan assets	12,162
Fair Value, Measurements, Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | Fixed Income Investments | Global credit fund
Schedule Of Pension Plan Assets By Fair Value [Line Items]
Fair value of plan assets	647
Fair Value, Measurements, Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | Fixed Income Investments | Emerging Markets
Schedule Of Pension Plan Assets By Fair Value [Line Items]
Fair value of plan assets	7,923
Fair Value, Measurements, Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | Fixed Income Investments | Corporate, government and foreign bonds
Schedule Of Pension Plan Assets By Fair Value [Line Items]
Fair value of plan assets	30,418
Fair Value, Measurements, Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | Fixed Income Investments | Asset backed – home loans
Schedule Of Pension Plan Assets By Fair Value [Line Items]
Fair value of plan assets	0
Fair Value, Measurements, Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | Other Investments | Multi asset funds
Schedule Of Pension Plan Assets By Fair Value [Line Items]
Fair value of plan assets	3,676
Fair Value, Measurements, Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | Other Investments | Contract with insurance company
Schedule Of Pension Plan Assets By Fair Value [Line Items]
Fair value of plan assets	0
Fair Value, Measurements, Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | Other Investments | Other
Schedule Of Pension Plan Assets By Fair Value [Line Items]
Fair value of plan assets	0
Fair Value, Measurements, Recurring | Significant Observable Inputs (Level 2)
Schedule Of Pension Plan Assets By Fair Value [Line Items]
Fair value of plan assets	3,596	5,381
Fair Value, Measurements, Recurring | Significant Observable Inputs (Level 2) | Cash
Schedule Of Pension Plan Assets By Fair Value [Line Items]
Fair value of plan assets	0
Fair Value, Measurements, Recurring | Significant Observable Inputs (Level 2) | Money market funds
Schedule Of Pension Plan Assets By Fair Value [Line Items]
Fair value of plan assets	0
Fair Value, Measurements, Recurring | Significant Observable Inputs (Level 2) | Equity Securities | Managed Volatility
Schedule Of Pension Plan Assets By Fair Value [Line Items]
Fair value of plan assets	0
Fair Value, Measurements, Recurring | Significant Observable Inputs (Level 2) | Equity Securities | U.S. Small/Mid-Cap Equity
Schedule Of Pension Plan Assets By Fair Value [Line Items]
Fair value of plan assets	0
Fair Value, Measurements, Recurring | Significant Observable Inputs (Level 2) | Equity Securities | World Equity (excluding United States)
Schedule Of Pension Plan Assets By Fair Value [Line Items]
Fair value of plan assets	0
Fair Value, Measurements, Recurring | Significant Observable Inputs (Level 2) | Equity Securities | Common Equity Securities – Teleflex Incorporated
Schedule Of Pension Plan Assets By Fair Value [Line Items]
Fair value of plan assets	0
Fair Value, Measurements, Recurring | Significant Observable Inputs (Level 2) | Fixed Income Investments | Intermediate duration bond fund
Schedule Of Pension Plan Assets By Fair Value [Line Items]
Fair value of plan assets	0	0
Fair Value, Measurements, Recurring | Significant Observable Inputs (Level 2) | Fixed Income Investments | Long duration bond fund
Schedule Of Pension Plan Assets By Fair Value [Line Items]
Fair value of plan assets	0
Fair Value, Measurements, Recurring | Significant Observable Inputs (Level 2) | Fixed Income Investments | High yield bond fund
Schedule Of Pension Plan Assets By Fair Value [Line Items]
Fair value of plan assets	0
Fair Value, Measurements, Recurring | Significant Observable Inputs (Level 2) | Fixed Income Investments | Global credit fund
Schedule Of Pension Plan Assets By Fair Value [Line Items]
Fair value of plan assets	0
Fair Value, Measurements, Recurring | Significant Observable Inputs (Level 2) | Fixed Income Investments | Emerging Markets
Schedule Of Pension Plan Assets By Fair Value [Line Items]
Fair value of plan assets	0
Fair Value, Measurements, Recurring | Significant Observable Inputs (Level 2) | Fixed Income Investments | Corporate, government and foreign bonds
Schedule Of Pension Plan Assets By Fair Value [Line Items]
Fair value of plan assets	0
Fair Value, Measurements, Recurring | Significant Observable Inputs (Level 2) | Fixed Income Investments | Asset backed – home loans
Schedule Of Pension Plan Assets By Fair Value [Line Items]
Fair value of plan assets	367
Fair Value, Measurements, Recurring | Significant Observable Inputs (Level 2) | Other Investments | Multi asset funds
Schedule Of Pension Plan Assets By Fair Value [Line Items]
Fair value of plan assets	3,229
Fair Value, Measurements, Recurring | Significant Observable Inputs (Level 2) | Other Investments | Contract with insurance company
Schedule Of Pension Plan Assets By Fair Value [Line Items]
Fair value of plan assets	0
Fair Value, Measurements, Recurring | Significant Observable Inputs (Level 2) | Other Investments | Other
Schedule Of Pension Plan Assets By Fair Value [Line Items]
Fair value of plan assets	0
Fair Value, Measurements, Recurring | Significant Unobservable Inputs (Level 3)
Schedule Of Pension Plan Assets By Fair Value [Line Items]
Fair value of plan assets	10,097	5
Fair Value, Measurements, Recurring | Significant Unobservable Inputs (Level 3) | Cash
Schedule Of Pension Plan Assets By Fair Value [Line Items]
Fair value of plan assets	0
Fair Value, Measurements, Recurring | Significant Unobservable Inputs (Level 3) | Money market funds
Schedule Of Pension Plan Assets By Fair Value [Line Items]
Fair value of plan assets	0
Fair Value, Measurements, Recurring | Significant Unobservable Inputs (Level 3) | Equity Securities | Managed Volatility
Schedule Of Pension Plan Assets By Fair Value [Line Items]
Fair value of plan assets	0
Fair Value, Measurements, Recurring | Significant Unobservable Inputs (Level 3) | Equity Securities | U.S. Small/Mid-Cap Equity
Schedule Of Pension Plan Assets By Fair Value [Line Items]
Fair value of plan assets	0
Fair Value, Measurements, Recurring | Significant Unobservable Inputs (Level 3) | Equity Securities | World Equity (excluding United States)
Schedule Of Pension Plan Assets By Fair Value [Line Items]
Fair value of plan assets	0
Fair Value, Measurements, Recurring | Significant Unobservable Inputs (Level 3) | Equity Securities | Common Equity Securities – Teleflex Incorporated
Schedule Of Pension Plan Assets By Fair Value [Line Items]
Fair value of plan assets	0
Fair Value, Measurements, Recurring | Significant Unobservable Inputs (Level 3) | Fixed Income Investments | Intermediate duration bond fund
Schedule Of Pension Plan Assets By Fair Value [Line Items]
Fair value of plan assets	0	$ 0
Fair Value, Measurements, Recurring | Significant Unobservable Inputs (Level 3) | Fixed Income Investments | Long duration bond fund
Schedule Of Pension Plan Assets By Fair Value [Line Items]
Fair value of plan assets	0
Fair Value, Measurements, Recurring | Significant Unobservable Inputs (Level 3) | Fixed Income Investments | High yield bond fund
Schedule Of Pension Plan Assets By Fair Value [Line Items]
Fair value of plan assets	0
Fair Value, Measurements, Recurring | Significant Unobservable Inputs (Level 3) | Fixed Income Investments | Global credit fund
Schedule Of Pension Plan Assets By Fair Value [Line Items]
Fair value of plan assets	0
Fair Value, Measurements, Recurring | Significant Unobservable Inputs (Level 3) | Fixed Income Investments | Emerging Markets
Schedule Of Pension Plan Assets By Fair Value [Line Items]
Fair value of plan assets	0
Fair Value, Measurements, Recurring | Significant Unobservable Inputs (Level 3) | Fixed Income Investments | Corporate, government and foreign bonds
Schedule Of Pension Plan Assets By Fair Value [Line Items]
Fair value of plan assets	0
Fair Value, Measurements, Recurring | Significant Unobservable Inputs (Level 3) | Fixed Income Investments | Asset backed – home loans
Schedule Of Pension Plan Assets By Fair Value [Line Items]
Fair value of plan assets	0
Fair Value, Measurements, Recurring | Significant Unobservable Inputs (Level 3) | Other Investments | Multi asset funds
Schedule Of Pension Plan Assets By Fair Value [Line Items]
Fair value of plan assets	0
Fair Value, Measurements, Recurring | Significant Unobservable Inputs (Level 3) | Other Investments | Contract with insurance company
Schedule Of Pension Plan Assets By Fair Value [Line Items]
Fair value of plan assets	10,092
Fair Value, Measurements, Recurring | Significant Unobservable Inputs (Level 3) | Other Investments | Other
Schedule Of Pension Plan Assets By Fair Value [Line Items]
Fair value of plan assets	$ 5