Fair Value Measurements (Financial Assets And (Liabilities) Measured At Fair Value) (Detail) (USD $) | 3 Months Ended | 6 Months Ended | |
Jun. 30, 2014 | Jun. 30, 2013 | Jun. 30, 2014 | Jun. 30, 2013 | Dec. 31, 2013 |
Fair Value, Inputs, Level 1 [Member] | ' | ' | ' | ' | ' |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ' | ' | ' | ' | ' |
TOLI policies held by the Rabbi Trust | $0 | $0 | $0 | $0 | ' |
Deferred Compensation Plan obligations | 0 | 0 | 0 | 0 | ' |
Fair Value, Inputs, Level 2 [Member] | ' | ' | ' | ' | ' |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ' | ' | ' | ' | ' |
TOLI policies held by the Rabbi Trust | 4,751,000 | 4,349,000 | 4,751,000 | 4,349,000 | ' |
Deferred Compensation Plan obligations | 4,298,000 | 2,882,000 | 4,298,000 | 2,882,000 | ' |
Fair Value, Inputs, Level 3 [Member] | ' | ' | ' | ' | ' |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ' | ' | ' | ' | ' |
TOLI policies held by the Rabbi Trust | 0 | 0 | 0 | 0 | ' |
Deferred Compensation Plan obligations | 0 | 0 | 0 | 0 | ' |
Foreign Exchange Forward [Member] | ' | ' | ' | ' | ' |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ' | ' | ' | ' | ' |
Foreign Currency Contract, Asset, Fair Value Disclosure | ' | ' | ' | ' | 12,100 |
Derivative foreign currency forward contracts (refer to Note 8) | 531,400 | -21,600 | 531,400 | -21,600 | ' |
Foreign Exchange Forward [Member] | Fair Value, Inputs, Level 1 [Member] | ' | ' | ' | ' | ' |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ' | ' | ' | ' | ' |
Derivative foreign currency forward contracts (refer to Note 8) | 0 | 0 | 0 | 0 | ' |
Foreign Exchange Forward [Member] | Fair Value, Inputs, Level 2 [Member] | ' | ' | ' | ' | ' |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ' | ' | ' | ' | ' |
Derivative foreign currency forward contracts (refer to Note 8) | ' | 22,000 | ' | 22,000 | ' |
Foreign Exchange Forward [Member] | Fair Value, Inputs, Level 3 [Member] | ' | ' | ' | ' | ' |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ' | ' | ' | ' | ' |
Derivative foreign currency forward contracts (refer to Note 8) | 0 | 0 | 0 | 0 | ' |
Interest Rate Swap [Member] | ' | ' | ' | ' | ' |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ' | ' | ' | ' | ' |
Derivative Instruments, Gain (Loss) Recognized in Income, Net | 286,700 | 89,500 | 355,600 | 155,900 | ' |
Interest Rate Derivative Assets, at Fair Value | 201,000 | 900,000 | 201,000 | 900,000 | 1,100,000 |
Interest Rate Swap [Member] | Fair Value, Inputs, Level 1 [Member] | ' | ' | ' | ' | ' |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ' | ' | ' | ' | ' |
Interest Rate Derivatives, at Fair Value, Net | 0 | 0 | 0 | 0 | ' |
Interest Rate Swap [Member] | Fair Value, Inputs, Level 3 [Member] | ' | ' | ' | ' | ' |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ' | ' | ' | ' | ' |
Interest Rate Derivatives, at Fair Value, Net | $0 | $0 | $0 | $0 | ' |