Consolidated Statements of Comprehensive Income (Loss) (Parenthetical) (Unaudited) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Statement of Comprehensive Income [Abstract]
Tax amount related to unrealized net gains on investment securities	$ 0	$ (60,000)	$ 0	$ (133,000)
Tax amount related to foreign currency translation adjustments	(94,000)	0	(94,000)	73,000
Tax amount related to unrealized net gains on interest rate derivative contracts	$ (1,246,000)	$ (9,460,000)	$ (5,060,000)	$ (13,059,000)