Recent Authoritative Accounting Guidance (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Number of Investments in Other Assets, Noncurrent	2
Accounting Standards Update 2014-01 [Member] | Investment in Affordable Housing Projects [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Other Commitment, Due in Next Twelve Months	$ 1,434
Other Commitment, Due in Second Year	4,101
Other Commitment, Due in Third Year	25
Other Commitment, Due in Fourth Year	25
Other Commitment, Due in Fifth Year	25
Other Commitment, Due Sixth Year	25
Other Commitment, Due Seventh Year	25
Other Commitment, Due Eighth Year	25
Other Commitment, Due Ninth Year	0
Other Commitment, Due Tenth Year	15
Accounting Standards Update 2014-01 [Member] | Investment in Affordable Housing Projects [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Other Assets, Noncurrent	3,062
Current Income Tax Expense (Benefit)	$ 7