Note 9 - Retirement Plans (Details) - Active Pension Plan Fair Value Measurements (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Assets:
Fair Value of Plan Assets	$ 58,063	$ 46,662
Insurance General Account [Member] | Fair Value, Inputs, Level 1 [Member]
Assets:
Fair Value of Plan Assets	0	0
Insurance General Account [Member] | Fair Value, Inputs, Level 2 [Member]
Assets:
Fair Value of Plan Assets	18,759	17,381
Insurance General Account [Member] | Fair Value, Inputs, Level 3 [Member]
Assets:
Fair Value of Plan Assets	0	0
Insurance General Account [Member]
Assets:
Fair Value of Plan Assets	18,759	17,381
Cash Equivalents [Member] | Fair Value, Inputs, Level 1 [Member]
Assets:
Fair Value of Plan Assets	0	0
Cash Equivalents [Member] | Fair Value, Inputs, Level 2 [Member]
Assets:
Fair Value of Plan Assets	1,959	1,457
Cash Equivalents [Member] | Fair Value, Inputs, Level 3 [Member]
Assets:
Fair Value of Plan Assets	0	0
Cash Equivalents [Member]
Assets:
Fair Value of Plan Assets	1,959	1,457
Equity Securities [Member] | Fair Value, Inputs, Level 1 [Member]
Assets:
Fair Value of Plan Assets	0	0
Equity Securities [Member] | Fair Value, Inputs, Level 2 [Member]
Assets:
Fair Value of Plan Assets	34,603	24,911
Equity Securities [Member] | Fair Value, Inputs, Level 3 [Member]
Assets:
Fair Value of Plan Assets	0	0
Equity Securities [Member]
Assets:
Fair Value of Plan Assets	34,603	24,911
Fixed Income Securities [Member] | Fair Value, Inputs, Level 1 [Member]
Assets:
Fair Value of Plan Assets	0	0
Fixed Income Securities [Member] | Fair Value, Inputs, Level 2 [Member]
Assets:
Fair Value of Plan Assets	2,742	2,913
Fixed Income Securities [Member] | Fair Value, Inputs, Level 3 [Member]
Assets:
Fair Value of Plan Assets	0	0
Fixed Income Securities [Member]
Assets:
Fair Value of Plan Assets	2,742	2,913
Fair Value, Inputs, Level 1 [Member]
Assets:
Fair Value of Plan Assets	0	0
Fair Value, Inputs, Level 2 [Member]
Assets:
Fair Value of Plan Assets	58,063	46,662
Fair Value, Inputs, Level 3 [Member]
Assets:
Fair Value of Plan Assets	$ 0	$ 0